Check out San Francisco 49ers center Marcus Martin doing some boxing drills
Posted by Niners Nation: A San Francisco 49ers Blog on
Check out San Francisco 49ers center Marcus Martin doing some boxing drills
Video of Marcus Martin doing some boxing drills, strength work
www.ninersnation.com
Check out the 49ers center doing some offseason work to improve at his craft.
Video of Marcus Martin doing some boxing drills, strength work
www.ninersnation.com
Check out the 49ers center doing some offseason work to improve at his craft.