"He has terrible running form and it's so frustrating," Clark said. "I do all that work in the offseason working on my form, pulling sleds and he just runs dumb. His hands are too low, he doesn't have knee drive and he's faster than everybody."
Wallace's speed is as much a storyline today as his return to Pittsburgh for two reasons: the Steelers have been susceptible to the deep ball and Wallace would love nothing better than to stick it to his former team.
The Steelers will be on high alert for Wallace, and they could get some help from the weather. A light snow is already falling, and the forecast is calling for cold temperatures, including sleet.
Wallace is not putting up the kind of numbers yet to justify the five-year, $60 million contract he signed last March, but Clark said he is dangerous as ever.
"(Dolphins quarterback Ryan) Tannehill's going through what Ben (Roethlisberger) kind of went through once you start playing with Mike, having to realize that you can't overthrow him," Clark said. "It's not like other plays when they get behind a guy you have to try to hang a ball up so he can get to it. When Mike's out there you have to throw it before he gets behind a guy because if you wait it's going to be short. He's still getting behind people at the same type of rate (when) he was here."
Wallace has made a relatively smooth transition to Miami, and he has apparently been a good fit in the locker room. Wallace is so gracious with the media that he may win the Dolphins' Good Guy Award in his first season with the team.
"He's a fun guy to have on the ball club," Dolphins coach Joe Philbin said. "I think he's acclimated himself well in the locker room. I think he's real respected by his teammates and he likes his teammates. It really doesn't matter what profession you're in it's always good to work with people you enjoy being with on a regular basis. I'm happy about the chemistry that he's found here."