"Since I was pitching good, I was just dealing with it," said Speier who had a 1.69 ERA in 15 relief appearances for the Angels in April. "As a veteran pitcher, I know over the course of a long season, if you're not getting your rest and you're losing weight, it's going to eventually affect your pitching down the road."
Speier said he has regained about five pounds while taking medications for the condition. He pitched in three simulated games at the Angels' extended spring training camp in Arizona over the past week. He is scheduled to pitch an inning for Class A Rancho Cucamonga on Thursday.
"Things are headed in the right direction, but I'm not totally out of the woods yet," he said. "There is no timetable (for him to rejoin the Angels). It's going to be until I feel my sleep patterns are back to normal and I've got my strength back."
Angels manager Mike Scioscia is hopeful that will be within the next few weeks.
"We hope it's becoming a short-term issue where as it was open-ended before," Scioscia said.