D'Arnaud's season lasted four games before he tore the UCL in his throwing arm and needed Tommy John surgery to repair it. He is expected to be ready for Opening Day, but let's be real, it's the Mets, so the range of outcomes here is from 100% healthy to amputation of the arm with a Civil War era bonesaw. D'Arnaud is nearly 1,500 plate appearances into his career and owns a disappointing .245/.306/.406 slash line, which is a far step down from those who scouted his minor-league numbers and got excited about what he was doing while overlooking the extremely friendly run environments he played in. He has had one season where he hit over .250, one where he had at least a .340 on-base percentage and one where he drove in 50 runs. The problem is none of those happened in the same season. Catchers take longer to develop than players at other positions, and given the lack of depth at catcher league-wide, a dart throw here is still defensible.

D’Arnaud rebounded back in a better direction in 2017 after injuries derailed his 2016 campaign. His 2017 numbers were not back to 2015 levels, but at least there was some catcher productivity to write home about in terms of homers and RBI. That is where the statistical compliments end because he hurt you in both average and on-base percentage leagues, but his pitch-framing abilities did help Mets pitching when it was not hurt on the disabled list. It is hard to believe that he is already 29 years old, but that is not a bad thing for catchers since they typically take a little longer to hit their stride at the plate. That stride may come in the form of him returning to his 2015 levels, but him hitting .275 with 20 homers -- as was the prediction during his notable rise through the minors -- seems like a pipe dream at this point.

The party line with d'Arnaud has always been plus power potential but can he stay healthy? Entering 2017, it's now fair to question the pop as he's declining in that department. Of course, the multitude of injuries have curtailed growth and catchers often hit the power peak later in their career, so there's still reason for optimism. A right rotator cuff strain cost d'Arnaud most of the first half and he never got it going after returning. The backstop's solid strikeout rate remained intact to go along with a league-average hard contact rate; there's still a reasonable batting average floor, especially for a catcher. However, 2016 featured a big drop in flyballs and HR/FB, resulting in a weak .076 ISO. The second-half struggles resulted in d'Arnaud ceding primary catching duties to Rene Rivera, putting his 2017 role in flux. He's plenty young enough to turn things around, but he needs to demonstrate last season's power outage was a blip, and stay healthy.

D'Arnaud has been one of the best hitting catchers for the better part of the last two seasons, but one longstanding question remains heading into 2016: Will he stay healthy? The 26-year-old has battled a myriad of injuries throughout his career, most recently hand and elbow issues which limited him to 67 games in 2015. He has exceeded 100 games played in just three of his nine professional seasons, with an average of 88.75 games played in his eight years with full-season clubs. When on the field in 2015, d'Arnaud routinely barreled up the ball, slugging .485 in 268 plate appearances, building upon his strong run from the final four months of 2014. However, the durability concerns have led the Mets to consider an even timeshare with d'Arnaud and Kevin Plawecki behind the plate. It's still possible one of the two could be traded, but the upside of both players will be capped if they do end up splitting time.

D'Arnaud's 2013 struggles lingered into 2014, with the former first-round pick batting just .178/.213/.311 with six extra-base hits (three homers) over the first two months of the season, while he lost time to a concussion. The decision was made in early June to send him for a tune up at Triple-A Las Vegas. Simply put, d'Arnaud was a different player upon his return. He smashed a three-run homer in his first game back and from June 24 on, d'Arnaud hit .272 (70-for-257) with 19 doubles, 10 homers and 32 RBI. D'Arnaud also shortened his swing and trimmed his strikeout rate by close to six percent in the second half (from 18.1% to 12.3%), giving hope to a Mets team that plans on competing in 2015 that he might be on the verge of a full-fledged breakout at the dish. Fantasy owners will obviously be hoping for the same, but without a longer track record of success at the major league level, d'Arnaud will likely remain a fringe starter in most mixed fantasy leagues, at least at the start of the season. He underwent surgery to remove bone chips from his elbow but is expected to be fine for Opening Day.

D'Arnaud, the centerpiece of the R.A. Dickey deal, heads into 2014 with major questions. He suffered an injury that sidelined him a good portion of the season for the second year in a row - this time, it was a fractured fifth metatarsal of his right foot that kept him out three months. When he was promoted, his defense was better than advertised, but his offense was near non-existent; he hit just .202 with one home run and five RBI over 112 at-bats in 31 games in the majors. Despite that, he will enter 2014 as the Mets' starting catcher, though Kevin Plawecki is starting to gain some favor as the best catcher in the team's system.

Widely regarded as one of the best catching prospects in baseball, d'Arnaud kept adding to his resume in 2012 before a knee injury ended his season early. In 279 Triple-A at-bats, he collected 16 home runs while batting .333. The Pacific Coast League has been generous to plenty of hitters before him and his BB/K rate (0.33) was not overly encouraging. The Mets acquired d'Arnaud as part of a package for R.A. Dickey in December, where he should take over as the team's primary catcher at some point in 2013 given his advanced defensive skills at a position of need.

d'Arnaud put a back injury and the pitcher-friendly Florida State League of 2010 behind him and re-established himself as a legit catching prospect with a breakout season at Double-A New Hampshire, hitting .311 with 33 doubles and 21 homers as a 22-year-old. He needs to control the strike zone better (33:100 BB:K in 466 plate appearances) if he wants to hold onto his offensive gains against more advanced competition, but he put himself back on the prospect radar after two disappointing seasons. The Jays have an interesting dilemma ahead if d'Arnaud continues to develop at the plate with J.P. Arencibia around, but for now they'll see how d'Arnaud handles the jump to Triple-A.

D'Arnaud battled a back injury and the pitcher-friendly Florida State League to cobble together a respectable season, hitting .259/.315/.411 in 71 games for High-A Dunedin in his first year in the Toronto system. He's got a good defensive reputation, but it remains to be seen if his bat will ever develop into anything fantasy-worthy. We'll have to see how he handles the jump to Double-A before getting too excited.

D'Arnaud was a supplemental pick in the first round of the 2007 draft. He got out of the gate slow with a .207/.269/.363 line in the first half of last season at Low-A Lakewood but really put things together in the second half, hitting .302/.366/.473. D'Arnaud is considered a solid defender and he flashed some power last year with 38 doubles and 13 home runs. If he can continue to hit like he did in the second half of 2009, the Blue Jays will have a very nice catching prospect on their hands after acquiring him in the Roy Halladay trade.