BOSTON - Red Sox pitcher Curt Schilling told a Boston radio station his right ankle injury is a stress reaction, not a bone bruise.

Schilling went on the 15-day disabled list on April 29 with what was listed as a bone bruise. The move was made retroactive to April 24, the day after Schilling allowed six runs over seven innings in a 6-5 loss to Tampa Bay.

“It wasn’t a bruise. It was a stress reaction, which is a precursor to a stress fracture,” Schilling said on WEEI on Tuesday.

Schilling did not talk with reporters Wednesday before the Red Sox played at Detroit.

Boston manager Terry Francona said the team hoped to have an update on Schilling and David Wells, on the DL with a sprained right foot, on Friday after they are evaluated again.

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Last week, the Red Sox said Schilling would be out at least two weeks. Schilling said Tuesday he did not have a timetable for his return.

“I think this is a real inexact science from the standpoint of when it’s gonna be right,” he told WEEI. “I’m sure it’s not overnight.”

Schilling is 1-2 with a 7.13 ERA in three starts this season. He was activated April 13 after missing the first seven games of the year.

The 38-year-old began the season on the DL while recovering from offseason ankle surgery. In Game 6 of the AL championship series and Game 2 of the World Series, Schilling was outstanding after a displaced tendon in his ankle was stitched to the skin.