Today Shea Theodore underwent successful upper-body surgery, and the Vegas Golden Knights will be without one of their better defenders for the foreseeable future. Theodore was having a pretty productive season thus far with a line of 4-14-18 in 20 games played, and was 1st among defenders and 4th overall on the team with a GAR rating of 4.5 via Evolving-Hockey. The Golden Knights’ rear guard last…