Pittsburgh Pirates pitching prospect Trent Stevenson has retired, and has been placed on the "Voluntary Retirement" list by the Pittsburgh Pirates. Stevenson was drafted in the seventh round of the 2009 draft, and was given a $350,000 bonus to break his commitment to the University of Arizona.

Stevenson had struggled the last two years in pro ball. Last year he started out in West Virginia, and posted a 6.93 ERA in 49.1 innings, with a 4.6 K/9 and a 2.4 BB/9 ratio, mostly working out of the bullpen. He was demoted to State College, where he worked out of the rotation, putting up a 5.80 ERA in 35.2 innings, with a 3.0 K/9 and an 0.8 BB/9 ratio.

This year Stevenson returned to West Virginia. He combined to give up a 9.26 ERA in 11.2 innings, with a 9:2 K/BB ratio. The bulk of the damag...

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