Valentin, 20, is on unpaid administrative leave by the Commissioner's Office, which is investigating the arrest.
Phillies employee assistance professional Dickie Noles has been dispatched to Clearwater, Fla., to help Valentin and his wife. Valentin will see a domestic violence counselor.
The Phillies acquired Valentin in August from the Dodgers for right-hander Roberto Hernandez. Valentin, who ranks 24th in the organization's prospects list by MLBPipeline.com, hit a combined .273 with 24 doubles, nine triples, seven home runs, 47 RBIs, 25 stolen bases and a .753 OPS last season with Class A Great Lakes and Class A Advanced Clearwater.
He is the son of former Major League player Jose Valentin.
Todd Zolecki is a reporter for MLB.com. Read his Phillies blog The Zo Zone. Follow him on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.