Walsh (head) will begin the season on the injured list, Sarah Valenzuela of the Los Angeles Times reports.

EDGE Analysis

According to Angels manager Phil Nevin, Walsh is dealing with headaches and insomnia, and he's begun to see a specialist, Doug Padilla of the Los Angeles Times reports. There's no timetable for a return at this point, and while this could be a short stay on the shelf for the 29-year-old, Los Angeles certainly won't rush back a player dealing with head trouble.