After a dominant spring, many hoped Julio Teheran had turned a corner. His disappointing 2012 campaign was attributed to a variety of mechanical changes, but offseason reports suggested Teheran had corrected those flaws. His tour of the Grapefruit League appeared to validate winter reports, as he struck out 35 batters in 26 innings and posted 1.04 ERA. While Teheran’s spring was cause for optimism, his first start of the regular season didn’t go so well, and the performance suggests there’s still more work to be done.
Last season, we discussed Teheran’s inconsistencies. Entering 2012, Teheran was ranked FanGraphs’ fifth best prospect in baseball, but he struggled to live up to the hype. To pinpoint the cause of his problems, I watched a random start from the 2011 season. On July 26 against the Durham Bulls, Teheran’s fastball velocity sat 93-95 MPH and frequently neared triple digits. His curveball, while erratic, showed promise. It featured a tight 11-5 break and, when thrown well, caused the Triple-A Rays to flail. His changeup was his best offering. After he established his fastball, hitters were helpless against his low to mid 80s changeup. His three pitch arsenal was electric and justified Marc Hulet’s ranking. Here are a couple of GIFs of Teheran pitching against the Mets in September of 2011, so you can see the movement for yourself.
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