Originally written on Fangraphs  |  Last updated 11/18/14
The Brewers were talking an extension with Corey Hart, and then they weren’t. Either way, extension is a key word for the 6-foot-6 slugger with the long levers. The sunglassed-one turns 31 next year, so he’s most likely either post-peak or he’s rapidly approaching his decline phase. At the very least, he’s lost some of the speed he had when he came up as a five-tool player: His speed scores are regularly below average now, and he hasn’t stolen double-digit bases since 2009. His batting profile also has begun to skew more towards power. As it goes with such a move, his strikeout rate has jumped along with his isolated power. How age affects those two talents would be most interesting to his current employer when considering a contract extension. Height is positively correlated with power. That seems like a no-brainer, and it’s backed up by some limited study on the subject. So maybe it’s not surprising that Hart’s power has remained steady as he’s aged, despite our early findings that isolated slugging might peak in the mid-20s: Anyone who has watched Hart swing perhaps wouldn’t be surprised that his strikeout rate has risen more than the league’s rate. You get older, your bat slows, and you’ve already got a huge zone to cover. After all: There’s still a chance this is just a one-person phenomenon, and that he might reverse it with a long off-season of work in the cage. At the very least, he could maintain his current strikeout rates for a while — maybe. Or do tall hitters age worse when it comes to strikeout rates? Jeff Zimmerman helped answer the question by running an aging curve for hitters in three buckets: shorter than 6 feet, between 6 feet and 6-foot-4, and taller than 6-foot-5. The results: Yikes. Age is not kind to giraffes when it comes to contact rate. And the tallest bucket had 1,023 players in it, so this isn’t a small-sample thing. Hart has a worse-than average career walk rate (7.1%). His speed has slowly eroded so that it’s below-average. His defense in the corner outfield has consistently been below average. To date, he’s managed to put up good power, along with a passable strikeout rate. Last year, the qualified hitters with an ISO over .235 struck out 21.3% of the time; Hart has spent the past three seasons ISO’ing .235 with a 22.7% strikeout rate. Those are his best traits. Hart’s post-peak and below average in most phases of the game, but he’s kept his power and strikeout rate acceptable so far. Still, with the strikeout aging curve for tall hitters in mind, extending him becomes a risky venture. You could practically fit an entire Eddie Gaedel in his strike zone, so maybe it’s no surprise.
GET THE YARDBARKER APP:
Ios_download En_app_rgb_wo_45
MORE FROM YARDBARKER

Aaron Rodgers wins NFL MVP

VCU G Briante Weber suffers major knee injury in loss

Short selling leaves hundreds of fans without S.B. tickets

Hamilton, Edmonds' spouses to appear on 'Real Housewives'

Ha Ha Clinton-Dix trolls LSU over Kevin Steele hire

LIKE WHAT YOU SEE?
GET THE DAILY NEWSLETTER:

Jerome Bettis elected to Pro Football Hall of Fame

Report: Duncan suing financial adviser, lost $20 million

Bret Bielema wanted Dolphins to draft Russell Wilson early

Nick Diaz apologizes to fans for skipping open workout

NFLPA President compares Goodell to a 2-year-old

NFL explains how Super Bowl balls will be prepped

2015 Pro Football Hall of Fame class announced

Anderson Silva beats Nick Diaz in return to octagon

WATCH: 'SNL' mocks Super Bowl

Sabres had a horrific month of January

Ole Miss uses Katy Perry as prop in recruiting

PHOTO: Ezekiel Elliott gets new national title tattoo

WATCH: Rondo takes brutal knee to face from teammate

Pig auctioned off at halftime of college basketball game

Should the Super Bowl be played on a Saturday?

Underwear company shows support for Marshawn Lynch

WATCH: WVU player flips opponent the double-bird

Five NFL players who could be cap casualties in 2015

MLB News
Delivered to your inbox
You'll also receive Yardbarker's daily Top 10, featuring the best sports stories from around the web. Customize your newsletter to get articles on your favorite sports and teams. And the best part? It's free!

By clicking "Sign Me Up", you have read and agreed to the Fox Sports Digital Privacy Policy and Terms of Use. You can opt out at any time. For more information, please see our Privacy Policy.
the YARDBARKER app
Get it now!
Ios_download En_app_rgb_wo_45

2015 Hall of Fame class announced

Aaron Rodgers wins NFL MVP

Tim Duncan suing financial adviser?

Five likely cap casualties of 2015

Making the case for NFL co-MVPs

WATCH: Tom Brady sings about balls

Missy Elliott to join Katy Perry at SB?

Obama zings Pats over Deflate-gate

Each major conference's POY candidates

Super Bowl XLIX preview and predictions: Patriots vs. Seahawks

The 13 things we want to see in Super Bowl XLIX

49 Stops to Super Bowl XLIX

Today's Best Stuff
For Bloggers

Join the Yardbarker Network for more promotion, traffic, and money.

Company Info
Help
What is Yardbarker?

Yardbarker is the largest network of sports blogs and pro athlete blogs on the web. This site is the hub of the Yardbarker Network, where our editors and algorithms curate the best sports content from our network and beyond.