DENVER -- The least spectacular, and least painful, lesson from 2015 is the one that means the most to Rockies outfield prospect David Dahl.
Lesson No. 1 -- a lacerated spleen really hurts -- is one Dahl will never have to repeat. The injury, after a collision with a teammate while chasing a fly ball at Double-A New Britain on May 28, resulted in the spleen being removed. Lesson No. 2 is foul balls off the right knee also are a drag. Although he recovered from the splenectomy and finished strong at New Britain, the knee issue ended his year early and cost him participation in the Arizona Fall League.