PEORIA, Ariz. — Given the list of players on the 40-man roster that are dealing with injuries — a total of 12 now, it would be easy to assume that Dr. Lorena Martin — the Mariners’ new director of high performance — would be a ball of anxiety and frustration. In her first year in the position and following the gushing praise of general manager Jerry Dipoto upon her hiring, there would seem to be plenty of pressure on Martin to keep what has been an injury-riddled organization over the past few seasons healthy and playing at an optimum level.