Bio: Boston's first supplemental first-rounder from 2010, Brentz is a 6-foot-1, 180-pound outfielder from Middle Tennessee State. He was taken with a compensatory pick received from the Mets for signing away Jason Bay.

Brentz received a signing bonus of $889,200 from Boston, and spent his initial time in pro ball with Lowell, the Red Sox affiliate in the New York-Penn League. He struggled to a .198/.259/.340 line with the Spinners, although 23 of his 52 hits went for extra bases.

He was also selected by the Indians in the 30th round of the 2007 draft.

2011: After the scuffles in Lowell, Brentz broke out in a big way this year with Low-A Greenville and High-A Salem. He put together an overall .306/.365/.574 line, with a gaudy 25 doubles, 30 home runs and 93 RBIs along the way. With Greenville, his wRC+ was an eye-popping 184. It lowered to a merely amazing 140 with Salem. 

What People Are Saying: Baseball America named Brentz its No. 5 prospect in the Red Sox system. Here's what they had to say.

"In a system filled with intriguing sluggers, Brentz has the most usable power. He combines explosive bat speed with pure strength, and he turned a corner when he realized his homers would come naturally. He toned down an all-or-nothing approach and used the field more in 2011, though his plate discipline still has room for improvement. "

When You Can See Him: Portland comes to Trenton April 9-11, May 10-13, June 22-25 and July 7-9.