Triple-A Worcester transferred Walter (shoulder) from its 7-day injured list to the 60-day IL on Wednesday.
Walter will begin the season on the injured list due to a strained left shoulder, Chris Cotillo of The Springfield Republican reports.
The Red Sox optioned Walter to Triple-A Worcester on Wednesday, Pete Abraham of The Boston Globe reports.
Walter struck out two over two hitless and scoreless innings in Tuesday's spring game against St. Louis.
Walter was optioned Friday to Triple-A Worcester, Chris Cotillo of The Springfield Republican reports.
Boston recalled Walter from Triple-A Worcester on Wednesday, Chris Cotillo of The Springfield Republican reports.
Walter was optioned to Triple-A Worcester on Saturday.
Boston recalled Walter from Triple-A Worcester on Friday, Pete Abraham of The Boston Globe reports.
Walter was optioned to Triple-A Worcester on Friday, Chris Cotillo of The Springfield Republican reports.
Walter was recalled from Triple-A Worcester on Wednesday, Christopher Smith of The Springfield Republican reports.