Yonder Alonso
Yonder Alonso
32-Year-Old First Baseman1B
 Free Agent  
Free Agent
2019 Fantasy Outlook
Alonso's 2018 season was a step back from his surprise 2017 season. By now, you know that Alonso converted himself from a slow-footed heavy groundball hitter into a flyball hitter during the 2017 offseason. He stuck with that trend in 2018, but not to the extreme that led to the power breakout. His average exit velocity fell 1.5 miles per hour, the average distance on his batted balls fell 16 feet and his average launch angle dropped from 19.4 degrees to 15.6 degrees. Those numbers are what we should have expected as the league fully adjusted to his changes at the plate, and they're sustainable moving forward. The numbers are much better than where he was two seasons ago, but they're not that great for a first baseman. His 2017 may have been a one-time thing, but the new baseline makes Alonso at least rosterable now in all formats rather than the last-resort option he was not so long ago. Read Past Outlooks
RANKSFrom Preseason
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$Signed a minor-league contract with the Rockies in July of 2019.
Plates run in loss
1BColorado Rockies  
August 26, 2019
Alonso went 1-for-4 with an RBI in Sunday's 11-4 loss to the Cardinals.
Alonso was making just his seventh start of August while regular first baseman Daniel Murphy received a maintenance day. As a veteran on a non-contending club who is headed for free agency this winter, Alonso is unlikely to see a notable uptick in opportunities over the final few weeks of the season unless Murphy succumbs to an injury.
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Batting Stats
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Batting Order Slot Breakdown
vs Right-Handed Pitchers
vs RHP
vs Left-Handed Pitchers
vs LHP
Left/Right Batting Splits
Since 2017
Since 2017vs Left .694 289 34 13 43 1 .221 .287 .407
Since 2017vs Right .779 1141 136 48 144 1 .250 .340 .439
2019vs Left .862 71 8 4 14 0 .254 .338 .524
2019vs Right .581 264 26 6 23 0 .183 .284 .297
2018vs Left .619 138 18 4 19 0 .227 .275 .344
2018vs Right .776 436 46 19 64 0 .258 .330 .446
2017vs Left .679 80 8 5 10 1 .181 .263 .417
2017vs Right .900 441 64 23 57 1 .282 .383 .517
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Home/Away Batting Splits
Since 2017
OPS on Road
OPS on Road
OPS on Road
OPS at Home
Since 2017Home .743 670 79 33 92 0 .233 .315 .428
Since 2017Away .778 760 91 28 95 2 .254 .342 .435
2019Home .544 157 13 4 16 0 .174 .261 .283
2019Away .728 178 21 6 21 0 .221 .326 .403
2018Home .691 273 31 12 40 0 .232 .300 .390
2018Away .780 301 33 11 43 0 .267 .332 .448
2017Home .936 240 35 17 36 0 .273 .367 .569
2017Away .805 281 37 11 31 2 .260 .363 .442
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Stat Review
How does Yonder Alonso compare to other hitters?
This section compares his stats with all batting seasons from the previous three seasons (minimum 400 plate appearances)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.

* Exit Velocity and Barrels/PA % are benchmarked against 2019 data (min 400 PA) and Hard Hit Rate is benchmarked against last season's data (min 400 PA). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
  • BB/K
    Walk to strikeout ratio
  • BB Rate
    The percentage of plate appearances resulting in a walk.
  • K Rate
    The percentage of plate appearances resulting in a strikeout.
    Batting average on balls in play. Measures how many of a batter’s balls in play go for hits.
  • ISO
    Isolated Power. Slugging percentage minus batting average. A computation used to measure a batter's raw power.
  • AVG
    Batting average. Hits divided by at bats.
  • OBP
    On Base Percentage. A measure of how often a batters reaches base. Roughly equal to number of times on base divided by plate appearances.
  • SLG
    Slugging Percentage. A measure of the batting productivity of a hitter. It is calculated as total bases divided by at bats.
  • OPS
    On base plus slugging. THe sum of a batter's on-base percentage and slugging percentage.
  • wOBA
    Weighted on-base average. Measures a player's overall offensive contributions per plate appearance. wOBA combines all the different aspects of hitting into one metric, weighting each of them in proportion to their actual run value.
  • Exit Velocity
    The speed of the baseball as it comes off the bat, immediately after a batter makes contact.
  • Hard Hit Rate
    A measure of contact quality from Sports Info Solutions. This stat explains what percentage of batted balls were hit hard vs. medium or soft.
  • Barrels/PA
    The percentage of plate appearances where a batter had a batted ball classified as a Barrel. A Barrel is a batted ball with similar exit velocity and launch angle to past ones that led to a minimum .500 batting average and 1.500 slugging percentage.
BB Rate
K Rate
Exit Velocity
88.2 mph
Hard Hit Rate
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Defensive Stats
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Stats Vs Upcoming Pitchers
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Recent RotoWire Articles Featuring Yonder Alonso
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Past Fantasy Outlooks
Alonso was a success story as the league-wide flyball revolution continued in 2017, fully tapping into the power that made him a top prospect in the Reds' system nearly 10 years ago. The new approach paid off, as Alonso's effort to hit more flyballs (career-high 43.2 FB%) was accompanied by a HR/FB rate spike from 5.1 percent in 2016 to 19.4 percent last season. In years past, he struggled to punish fastballs, but he slugged .683 against four-seamers and .704 against two-seamers in 2017, with 18 of his career-high 28 homers coming against those two offerings. The Mariners acquired Alonso from the A's in a midseason trade, but he faded in the second half, finishing with a .774 OPS when his flyball rate bottomed out at 36.1 percent and he pulled the ball excessively. He should hold the large side of a platoon at first base after signing with the Indians, but Alonso is a much more interesting corner-infield filler than he was a year ago.
Another year, another season of mediocrity for Alonso, who has long lost any semblance of hype from his prospect days. His biggest fantasy asset is playing time, and in 2016, he logged nearly a full season;s worth of at-bats after a few years of platoon play and injuries. The vet, who turns 30 in April, posts contact rates befitting a .300 hitter but has only hit above .280 in a full season twice. Not even his typically above-average plate-discipline indicators have helped him offer consistently great on-base percentages. And of course, fantasy players desire more power from a corner infielder than what he can give. He hasn't hit double-digit homers in a season yet, thanks to his underwhelming ability to hit flyballs. Maybe one year, he'll figure out how to leave the yard, but 2017 is not the season to bank on it without a major change to his approach.
Alonso was once again hit by some bad injury luck in 2015, missing most of May and September due to shoulder and back ailments. In his 103 games in the 2015 campaign, Alonso cobbled together a .282/.361/.381 slash line with five home runs, 18 doubles, and 31 RBI. Those power numbers are concerning, especially coming from a first baseman. His ISO also dropped from an already-low .131 in 2014 to just .099 in 2015, which is not a great sign for a player who theoretically should be entering his prime at age 28. Obviously, having Petco Park as his home stadium did not help matters, and he has a good approach, but plate discipline alone may not be enough to get him out of the basement among mixed-league first basemen. Following a move to another pitcher's park in Oakland this offseason, Alonso's prospects for a big season in 2016 are looking rather bleak, but he should still serve as an option in AL-only leagues.
Through the first two and a half months of last season, Alonso avoided the injury bug that has plagued his career, but a sore right wrist emerged in mid-June and induced yet another trip to the disabled list. The Padres’ wretched offense was in full swing by that point, and their starting first baseman was a prime culprit, mustering a .210/.250/.341 batting line, with a low .131 ISO and .222 BABIP in tow. Upon his return to the lineup in the latter portion of July, he managed to hit the cover off the ball for nearly three weeks, before a right forearm strain ended his campaign for good. The aforementioned surge at the plate boosted his final line to a more respectable .240/.285/.397. If the power demonstrated last year (seven homers and 19 doubles in 267 at-bats) continues unabated, Alonso may finally tap into the potential that has been evident, when healthy, during parts of five professional seasons.
Alonso, who entered the season as the Padres' unquestioned starting first baseman, didn't disappoint during the first two months, belting three homers each in April and May, before landing on the disabled list due to a broken hand. Upon his return just before the All-Star break, he failed to clear the fences thereafter, while tallying just four extra-base hits (all doubles) and receiving no at-bats after Aug. 30 due to sore hands. However, he displayed greater plate discipline in the second half -- a 17:15 K:BB ratio in 135 at-bats versus 15:32 in 199 at-bats in the first -- a telling sign that his ailments were taking a toll on his power stroke. The left-handed hitter, when healthy, clearly took advantage of Petco Park's more friendly right-field fence, which was moved in prior to 2013's opening pitch, as evidenced by four long balls at home. As a result, Alonso enters his age-27 season poised to surpass the career-high nine home runs he achieved in 2012, so long as he avoids the injury bug.
In his first full season in the majors, Alonso got off to a slow start (.263/.344/.362, three homers), but finished strong after the All-Star break (.285/.352/.430, six homers). As a lefty, he unsurprisingly hit righties much better than he hit lefties with eight of his nine home runs coming against them. In sum, it was a promising rookie year for the young first baseman. In 2013, Alonso will need to show more power, if he is to be taken seriously as a corner bat and because his home park demands it. He'll be close to 26 years old when the season starts, so it's natural to expect his power to continue to develop. If he can keep his strikeout rate low, there's good reason to believe that Alonso will avoid a sophomore slump, and he should benefit from having the right-field fences moved in at Petco Park.
At the plate, Alonso hit a robust .330/.398/.545 in 88 at-bats, fueled by a .387 BABIP. Alonso hasn't yet hit for the power many had hoped for from the 2008 first-round pick, but many believe that still could be coming. The Reds included him in a package sent to the Padres for Mat Latos in December, which finally removed Joey Votto as a roadblock to playing time at first base. Now that "lack of position" is no longer a part of his scouting report, Alonso is a nice sleeper after delivering a .943 OPS in limited duty as a 24-year-old for the Reds last season. The Padres traded Anthony Rizzo to the Cubs in January, so Alonso appears to be the favorite to start at first base come Opening Day.
Alonso started slowly in 2010 while trying to recover from the broken hamate bone that slowed his 2009 season down. A strong second half left him with decent overall numbers, though not the monster power numbers the Reds were hoping for when they drafted him. The bigger problem for the Reds is that an attempt to move him to left field at Triple-A Louisville fizzled out, leaving him without a position at the major league level, with Joey Votto obviously not going anywhere. There's a good chance that his bat will eventually catch up to expectations, but the odds are it will be with another organization after Alonso gets dealt. Because of the position issue, Alonso will probably spend half the summer in Louisville again.
Alonso is going to present a dilemma to the Reds in the future, because he can only handle first base (and marginally at that) defensively, and Joey Votto is firmly ensconced there. But that's not going to be an issue in 2010 - Alonso's bat, particularly his ability to hit for power, still needs work. A broken hamate bone suffered midseason while playing for Double-A Carolina slowed down his progress and cut back on Alonso's power once he returned. He hit well in the Arizona Fall League, but once again not for power. Look for him to spend most of 2010 at Triple-A Louisville.
Alonso was the Reds' first-round pick out of the University of Miami and signed right at the deadline after a somewhat rancorous negotiation. He tore it up in the Hawaii Winter League (.308/.419/.510) and could begin 2009 as high as Double-A Carolina. Alonso's good power and plate discipline made it hard for the Reds to pass him up in the draft, despite their needs at other positions. Defensively, he can only really handle first base, meaning that by 2010 the Reds will have to figure out how to get both him and Joey Votto in the lineup.
More Fantasy News
Hits first homer with Rockies
1BColorado Rockies  
July 28, 2019
Alonso went 2-for-5 with a two-run home run in a 3-2 loss against the Reds on Sunday.
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Two doubles in first start for Rox
1BColorado Rockies  
July 24, 2019
Alonso went 2-for-3 with a walk, two doubles and two runs scored in a 3-2 loss to the Nationals during the first game of Wednesday's doubleheader.
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Earns promotion to big leagues
1BColorado Rockies  
July 23, 2019
Alonso will have his contract selected from Triple-A Albuquerque prior to Tuesday's game against the Nationals, Nick Groke of The Athletic reports.
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Latches on with Colorado
1BColorado Rockies  
July 11, 2019
Alonso signed a minor-league contract with the Rockies on Thursday, Jon Heyman of MLB Network reports.
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Cut loose
1BFree Agent  
July 3, 2019
The White Sox have requested release waivers on Alonso.
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