Giants infielder Kevin Frandsen ruptured his left Achilles? tendon in a minor league game Monday and could miss the entire season, according to an Associated Press report. Frandsen, who was expected to be a key utility infielder and perhaps start at times at second base, injured his leg while running the bases after getting aboard on a single. ?I?ll have to wait for the MRI exam, which could be today or tomorrow depending when the swelling goes down,? GM Brian Sabean said in a phone interview. ?I don?t want to comment further until we know.?