Domestic battery charges against Manny Ramirez were dropped Friday by Broward County State Attorney's office.

Ramirez, signed by Oakland in February after sitting out most of the 2011 season, was arrested last September 12 after allegedly striking his wife with an open hand. He had denied any wrongdoing.

The South Florida Sun-Sentinel quoted the State Attorney's office as saying the victim did not cooperate in its investigation, forcing the office to drop the charges.

According to the police report, Ramirez's wife told the arresting officer that the couple was "involved in a dispute that escalated." Juliana Ramirez said her husband struck her in the left side of her face with an open hand, causing her to hit her head against the headboard of their bed.

Fearing that the situation might escalate, she called police and was observed by an officer to have swelling on the left side of her face and a small contusion on the back of her head, according to the report. She refused medical attention.

The former World Series MVP told police that he had grabbed his wife by the shoulders and shrugged her, causing her to hit her head on the headboard.

Manny Ramirez is in spring training with Oakland in Arizona. He played just five games with Tampa Bay last April and suddenly announced his retirement after a second violation of the league's Joint Drug Prevention and Treatment Program. The penalty would have included a 100-game suspension, but he instead chose to hang up his cleats.

In December, Ramirez applied for reinstatement. The Office of the Commissioner and the Players Association then decided that Ramirez must first serve a 50- game suspension.

Ramirez, a 12-time All-Star who will turn 40 years old on May 30, previously served a 50-game ban in 2009 as a member of the Dodgers for his first drug violation.

In 19 seasons with the Indians, Red Sox, Dodgers, White Sox and Rays, Ramirez has batted .312 with 555 home runs and 1,831 RBI. He won World Series titles with Boston in 2004 and 2007, capturing MVP honors in the 2004 sweep of St. Louis.