Jordan Walden did not throw as scheduled Friday due to a "knot in his lat," MLB.com's Jenifer Langosch reports.

Walden did not throw as scheduled Friday due to a "knot in his lat," MLB.com's Jenifer Langosch reports.

Analysis:

Further details regarding Walden's status were not reported, but manager Mike Matheny said there is some concern about the injury, which puts Walden's status for Opening Day into question.