Anyone waiting to see top pitching prospect Taijuan Walker on the mound this season will have to wait a little bit longer.

The Seattle Mariners shut Walker down from all throwing for two weeks after a Wednesday examination revealed a "right shoulder inpingement."

The Mariner's decision to shut down Walker came just one day after he was scratched from a Triple-A rehab start. This isn't the first time this season that Walker has had a setback, having been shut down for a short time in early March.

Walker finished 1-0 in 2013 after three starts with a 3.60 ERA and 12 strikeouts.

For a Mariner's team that has already dealt with a flurry of injuries after 13 games and who are still without All-Star Hisashi Iwakuma, losing Walker for an extended time could be big trouble for Seattle.