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Joe D.the "C" stands for Cobb of course. 
Seriously... When I was researching a postcard I had (recently sold).... one of the pitchers pitched against Smokey Joe Wood. Not in the majors - but rather, two town team rivalries decided to hire ringers for their annual game. One hired local talent (minor / major)... the other team... well, the Red Sox were in town and they were hired.
Could Cobby have played in one of these type games? He may just have been a ringer.
http://www.bioproj.sabr.org/bioproj.cfm?a=v&v=l&bid=1420&pid=4204
"Following the 1910 season, the Hoosick Falls council of the Knights of Columbus engaged Evans to pitch for an all-star aggregation of minor leaguers in a game on October 12 against the Bennington council. With Evans on the mound, Hoosick Falls must have felt confident that it would win the $100 prize wagered on the annual Columbus Day game.
Little did the New Yorkers know that the Bennington council had hired the Boston Red Sox, who had played an exhibition game in Burlington just two days earlier. With Smokey Joe Wood and Ray Collins splitting the mound duties, the "Bensox" won 11-1 in a game described by the Bennington Free Press as a "runaway for the Speed Boys." The minor league all-stars "by comparison looked like a lot of children." Evans was the losing pitcher, giving up nine runs in just four innings."