NEW YORK (AP) - Baltimore Orioles pitcher Jamie Walker has been fined by the baseball commissioner's office for criticizing umpire Angel Hernandez.

Hernandez called a balk on Walker during the seventh inning of Tuesday night's 7-5 loss to the Los Angeles Angels at Camden Yards when the left-hander appeared to pick off Maicer Izturis. Three batters later, Kendry Morales hit a two-run double for a 7-4 lead.

Walker said it was a terrible call and "unacceptable at this level."

Bob Watson, baseball's vice president for discipline, imposed the fine Thursday.

Phil Tannenbaum, Walker's agent, said the players' association had appealed the penalty.

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