Marcus Stroman is one of the very best pitchers in baseball. Since the beginning of last season, his 6.7 WAR is 13th in the league, right behind Jon Lester, Stephen Strasburg, and Jose Quintana — and just ahead of Jacob deGrom, Madison Bumgarner, and Zack Greinke. If you’re a believer in ERA, you probably didn’t think much of his 4.37 mark last year but are much more impressed by this season’s 2.99 figure. His FIP has remained steady, right around 3.70.
Despite a listed height of 5-foot-8, Stroman has recorded one of the league’s higher average fastball velocities. While there’s typically a relationship between velocity and strikeouts, that’s never been integral to Stroman’s success. His game is about inducing ground balls. It works well for him, but it does also leave room for some to regard him as something less than an ace.
As far as the ground-balling goes, Stroman’s elite. His 60.1% ground-ball rate topped all pitchers last season. He’s actually improved upon that figure this year, recording a 62.6% rate so far. The right-hander’s 61.2% ground-ball rate in 2016 and 2017 is the second-highest over a two-year period (min. 300 innings pitched) this decade behind Dallas Keuchel’s 62.6% mark in 2014 and 2015. Tim Hudson is the only other pitcher to exceed 60% grounders over a two-year period since 2010.
Inducing a lot of ground balls is a good thing, largely because ground balls can’t become homers. Stroman’s 0.87 HR/9 over the last two years is indicative of that; it places second among qualified starters only to Michael Fulmer’s 0.80 mark. Even after dropping the inning requirement to 250, Stroman sits behind only Fulmer, Clayton Kershaw and Kyle Hendricks. Stroman’s ability to limit homers helps make him one of the league’s better pitchers, even without an abundance of swings and misses.
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