Taijuan Walker to begin rehab assignment on Wednesday

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Mariners starter Taijuan Walker will begin a rehab assignment with Triple-A Tacoma on Wednesday, MLB.com’s Greg Johns reports. The 21-year-old right-hander was shut down during spring training due to bursitis in his right shoulder. He appeared to be on his way back after making two rehab starts on April 4 and 9, but he felt impingement in his shoulder and was shut down again.

The Mariners drafted Walker in the first round, 43rd overall, of the 2010 draft. He made his major league debut last season, posting a 3.60 ERA with 12 strikeouts and four walks in 15 innings over three starts. Walker has made two minor league rehab starts this season: one with Single-A High Desert in which he allowed a run over 4 1/3 innings, and another with Double-A Jackson in which he struck out 10 batters over five shutout innings.

If things progress as planned, Walker could rejoin the Mariners in early June.