Shaun Michael Marcum (born December 14, 1981 in Kansas City, Missouri) is a Major League Baseball starting pitcher for the Toronto Blue Jays. He was drafted in the third round, 80th overall, of the 2003 Major League Baseball Draft, by the Blue Jays. Marcum shot up through the minors and made his MLB debut on September 6, 2005.
Marcum was a late season call-up from the minors in September when rosters expanded. Before making his debut, Marcum was often compared to his then fellow teammate Josh Towers by Blue Jays commentators Tom Candiotti and Pat Tabler. He wasn't a hard thrower and relied on locating his pitches for success. Marcum pitched 8 innings, giving up six hits, without surrendering a run in his debut.
Marcum went 3-4 for the Blue Jays in 2006 in 21 games including 14 starts. His ERA was a bit high though (5.06). In his final 7 starts, had a winning record of 2-1 with a 3.31 ERA.
Marcum had a breakthrough season in 2007. He went 12-6 with an ERA of 4.13. Marcum developed and improved his pitching style. He started to become known as more of a power pitcher. His fastball was clocked most times at around 89-90 MPH. His changeup became his best pitch, as he struck out batters
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