Brent Grimes didn’t seem overly upset, though he wasn’t smiling, either. The Miami Dolphins cornerback had just been told teammate Mike Wallace drew some laughs at Grimes’ expense a week earlier. Wallace said fellow receiver Brian Hartline, “thought (Grimes) was falling down but he was actually just back peddling, so he's just short.” Standing among a crowd of reporters and camera people, the 5-foot-10 Grimes acted like height comments were nothing new. "I don’t really look at corner as a big position for the most part," Grimes said. "Most corners are about 5-11 … I mean, I’m not 5-6. "I’m short but this is just what I do – I make plays, I compete. That makes up for it." That’s what the Dolphins were counting on when they signed Grimes to a one-year, free-contract in March. He’s coming off two injury-plagued seasons with the Atlanta Falcons, who signed Grimes as an undrafted free agent from Division II Shippensburg University (Pa.) in 2006. Grimes played briefly with the Hamburg Sea Devils in NFL Europe before joining the Falcons. He then made himself into a Pro Bowl defensive back in 2010. Miami obviously hopes Grimes will return to his elite form. "We thought he had excellent instincts and competitiveness," coach Joe Philbin said. "Beyond anything else, those were the things that stood out to us. He played bigger than his size." Grimes suffered a torn Achilles’ tendon in the first game last year and missed the rest of the season. At a recent Dolphins OTA (organized team activity), he said he’s on schedule or training camp.