The Minnesota Twins continue to stockpile arms for what could be an interesting competition for a rotation spot this spring. First reported by the Star Tribune’s LeVelle Neal yesterday, the Twins moved quickly and signed right-handed starter Rich Harden to a minor league deal to include a spring training invite. Harden, 31, missed all of 2012 after a shoulder strain necessitated rotator cuff surgery. Interestingly enough, the injury’s ...