Robertson pitched for the Harwich Mariners this summer .
Robertson was clearly the right - handed ace for Buddy Custer 's 19 - 25 club , going 3 - 3 with a 1.46 ERA and 59 strikeouts in 55.1 innings pitched .
Pitching for the Harwich Mariners this summer , Robertson was clearly the right - handed ace for Buddy Custer 's 19 - 25 club , going 3 - 3 with a 1.46 ERA and 59 strikeouts in 55.1 innings pitched .