Outfielder Jordan Schafer, the top prospect in the Atlanta Braves' farm system, was suspended for 50 games Tuesday by the baseball commissioner's office, which said he used human growth hormone in violation of the sport's minor league drug program.

The 21-year-old Schafer, ranked as the No. 25 prospect overall this year by Baseball America, is projected to take over in center field for the Braves in 2009. He got his first taste of the big league club this spring as a non-roster invitee.

RAYS PITCHER MATT GARZA LEAVES GAME: Tampa Bay starter Matt Garza left the game Tuesday night against the Seattle Mariners with two outs in the third inning because of an irritated nerve in his pitching arm.

POLANCO'S ERRORLESS STREAK ENDS: Detroit Tigers second baseman Placido Polanco made a throwing error in the third inning of Tuesday's game against the Boston Red Sox — ending his major league record errorless streak at 911 chances and 186 games.

MOTHER OF HANK AARON DIES: Estella Aaron, the mother of baseball Hall of Famer Hank Aaron, has died. She was 96.

Susan Bailey, assistant to the former Atlanta Braves star, said Tuesday she died Monday in an Atlanta hospital after a short illness.

The funeral will be Saturday at Greater Morning Star Baptist Church in Mobile, Ala., the city where she lived most of her life.

LIRIANO STARTS SECOND MINOR LEAGUE GAME: Twins pitcher Francisco Liriano had an erratic second rehab start for Triple-A Rochester on Tuesday night.

Liriano, recovering from reconstructive elbow surgery that forced him to miss the entire 2007 season, gave up three runs and five hits in four innings in a loss to Norfolk. Liriano walked three and struck out three.

Liriano threw 88 pitches Tuesday, a few more than he threw for Class A Fort Myers on Thursday.

"I am just trying to get confident," Liriano said.