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Jeff Zimmerman

Jeff Zimmerman

Jeff Zimmerman writes about all things Baseball for RotoWire. He also handles scouting and reporting for PrepBaseballReport.com. Jeff also contributes to RoyalsReview.com, FanGraphs.com and BaseballHeatMaps.com.

Fantasy sports articles written by Jeff Zimmerman

The Saber's Edge: Post-Hype Prospects

This year's disappointments could be next year's targets, writes Jeff Zimmerman, who lays out a host post-hype prospects to track for 2016.

The Saber's Edge: Building A Better Pitching Staff

Jeff Zimmerman looks back at his 2015 drafts and examines how he can better value pitchers with an eye toward 2016. Should we be optimistic about a pitcher like Robbie Ray?

The Saber's Edge: How to Target Older Players

Mark Teixeira, A-Rod and Albert Pujols are having big seasons. Jeff Zimmerman has tips on finding the next batch of over-30 bargains.

The Saber's Edge: Determining the True Value of Inactive Players

Jeff Zimmerman does the math to figure values for inactive players, including the Marlins' Giancarlo Stanton.

The Saber's Edge: Power and Age

Jeff Zimmerman looks at power projections for some of baseball's aging sluggers, including the Angels' Albert Pujols.

The Saber's Edge: Batter Up

Jeff Zimmerman crunches the numbers to look for second-half hitting stars.

The Saber's Edge: Second-Half Pitching Predictions

Can Chris Archer keep this up? Jeff Zimmerman crunches the numbers using K%-BB% and something called R-squared to predict the second half.

The Saber's Edge: Sinking Feeling

Jeff Zimmerman on the pitchers with the most effective sinking fastballs.

The Saber's Edge: Arms Race

Jeff Zimmerman looks at some of the top young pitchers in the game.

The Saber's Edge: Big Names. Big Futures?

Jeff Zimmerman looks at some recent call-ups and what we can expect from their careers

The Saber's Edge: Need for Speed

Jeff Zimmerman on batted-ball velocity stats and what they can tell us about today's top hitters.

The Saber's Edge: By the Numbers

Jeff Zimmerman on using advanced stats to find waiver-wire values.

The Saber's Edge: Getting Lucky

Jeff Zimmerman on Michael Wacha and other pitchers that have been more lucky than good this season.

The Saber's Edge: Batter vs. Pitcher Stats

Jeff Zimmerman analyzes batter vs. pitcher splits to find out what's really relevant and predictive for fantasy owners and daily game players.

The Saber's Edge: Getting Up to Speed

Jeff Zimmerman looks at the predictive value of batted-ball velocity and why it might make Hanley Ramirez a buy-high candidate.

The Saber's Edge: The Perfect Time to Panic

Jeff Zimmerman on whether it's time to be concerned about slow-starting Andrew McCutchen and others.

The Saber's Edge: Patience has Virtues. And Limits.

When should we start paying attention to early-season stats? Jeff Zimmerman offers some guidelines.

The Saber's Edge: Reality Check

Jeff Zimmerman looks at deceptive early stats, including Adam Jones' otherworldly batting average.

The Saber's Edge: Checking the Radar Gun

Jeff Zimmerman analyzes the biggest gainers and decliners in fastball velocity this season, and he doesn't like what he sees from Koji Uehara's high-school fastball.

The Saber's Edge: On the Upswing

Jeff Zimmerman lets us in on the secret for the most underutilized stat in fantasy baseball, and how you can use it to your great advantage.

The Saber's Edge: Early Season Rules for Owners

Jeff Zimmerman offers tips on how to evaluate players in the early going of the season, including how to figure out when a player is hurt rather than just slumping.

The Saber's Edge: Need for Speed

Jeff Zimmerman looks at whether spring-training steal rates can predict regulare-seasonr rates and how the Dee Gordon trade will impact the Dodgers and Marlins.

The Saber's Edge: How to Pick a Breakout Pitcher

Looking for a breakout pitcher? Jeff Sullivan shares the key stat for targeting pitchers on the verge of breaking out, and he has the data to back it up.

The Saber's Edge: AL LABR Recap

Jeff Zimmerman's AL LABR draft strategy was to spread his dollars, and he ended up spending big on only one player, Jose Abreu.

The Saber's Edge: What to Look for in Spring Training

Spring training stats don't mean much, and player information can he hard to find. Jeff Zimmerman outlines four important things to look for in spring training and, just as important, how to find them.

Chasing Saves: Setup Men Who Could Close

Jeff Zimmerman ranks setup men according to the number of saves they could get this season, and Philadelphia's Ken Giles might be the best bet.

The Saber's Edge: The 2014 Report Card

Jeff Zimmerman looks back at his columns from 2014 to see the hits and misses, including his projected struggles for Evan Longoria.

The Saber's Edge: Projecting Power for 2015

Javier Baez has shown incredible power in the second half of 2014, but how much can he deliver in 2015? Jeff Zimmerman looks at the possibilities for Baez, and several others for next season.

The Saber's Edge: Future Closers

Ken Giles has all of the tools to become a closer, but he needs the Phillies to find a taker for Jonathan Papelbon in order to ascend to the ninth-inning role in Philadelphia.

The Saber's Edge: Starting Pitchers for the Stretch Run

Are Kevin Gausman and the Orioles' starting pitchers undervalued? Jeff Zimmerman looks for potential starting pitcher pickups for the final weeks of the season.

The Saber's Edge: Second Half Skill Changes

Jason Hammel has struggled since being traded to Oakland. Jeff Zimmerman looks at Hammel's fall, and other second-half skill changes in this week's installment of The Saber's Edge.

The Saber's Edge: Second-Half Breakout Hitters

Chris Carter has always shown a combination of impressive power and inconsistent contact skills, but is he finally putting all together in the in the second half? Jeff Zimmerman attempts to identify hitters having a breakout.

The Saber's Edge: No Trouble with the Curve

With an excellent curveball, Corey Kluber has had a full breakout in 2014. Jeff Zimmerman looks at the trends of the curve, and seeks out other pitchers with the potential to take a big leap forward.

The Saber's Edge: Power Shifts

In this week's column, Jeff Zimmerman uses available data to analyze significant shifts in power, including the decline of Jay Bruce this season.

The Saber's Edge: Utilizing Velocity Decline

Pitchers lose velocity as they age, but how much of a drop does it take to become a red flag? Jeff Zimmerman looks at Mat Latos and other pitchers working with less velocity in 2014.

The Saber's Edge: BABIP Swings

Lonnie Chisenhall's 2014 breakout has been fueled by a significant shift in BABIP. How rare is an increase of that magnitude? Jeff Zimmerman dives into the numbers.

The Saber's Edge: ERA Estimators

Even if Johnny Cueto regresses to the level of his ERA estimators, he'll still be elite, but can he stay healthy in the second half? Jeff Zimmerman looks for hidden value on the mound.

The Saber's Edge: A Look at Batted Ball Profiles

Dallas Keuchel doesn't have an elite strikeout rate, but he has parlayed his high groundball rate and infield flyball rate into a breakout campaign in 2014.

The Saber's Edge: Good Bet To Succeed?

Is Mookie Betts a good bet to become a productive big league hitter? Jeff Zimmerman breaks down the current crop of hitting prospects to find the players most likely to become productive bats at the top level.

The Saber's Edge: Tracking Home Runs

Jose Abreu has provided even more power than expected through his first two-plus months in the big leagues. Can he sustain that level of home-run production?

The Saber's Edge: Targeting BB% Improvements

Madison Bumgarner had room for improvement with his walk rate entering 2014. Jeff Zimmerman explains the hidden value in pitchers with room to improve their control.

The Saber's Edge: Elite Once More?

Finally healthy again, Johnny Cueto has delivered a huge profit through the first two months of the season. What level can he sustain the rest of the way? Jeff Zimmerman ponders that question.

The Saber's Edge: Upon Further Review: Eric Hosmer

Where has Eric Hosmer's power gone? Jeff Zimmerman breaks down the tape to determine why the home runs have disappeared for the Kansas City first baseman.

The Saber's Edge: Down Goes Brown

Where has Domonic Brown's power gone? Jeff Zimmerman takes a look at the early-season indicators that can reveal skills loss.

The Saber's Edge: Freak the Mighty, Again?

Tim Lincecum's dominant start against the Braves earlier this week has left some to wonder if he's returning to his once-elite form. Jeff Zimmerman breaks down the impact of swing-and-miss lineups on starting pitching performances.

The Saber's Edge: A Closer Look at Home Runs

Jose Abreu has shown excellent power early on, but is a correction on the horizon? Jeff Zimmerman takes a closer look at early home run and flyball data.

The Saber's Edge: Red Light, Green Light

While Starlin Castro is rebounding from a dismal 2013 at the plate, he no longer looks like a threat to steal 20 bases. Jeff Zimmerman takes a look around the league at early stolen-base indicators.

The Saber's Edge: Predicting ERA

Should you Buy High on Ervin Santana? Jeff Zimmerman shares his plan of attack for predicting ERA based on other early-season metrics.

The Metric System: Predicting Batting Average

Few metrics have stabilized to this point in the season, but there is enough data to put the pieces together for expected batting averages. Jeff Zimmerman explains...