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Quite the opposite of Derek Sherrod, Gabe Carimi certainly doesn't have a problem finishing off blocks. Carimi is known for his "mean streak," and the Outland Trophy winner is arguably the best run blocker in the draft. He attacks the defensive line, is quick off the snap, and has both the technique and natural abilities to dominate.
Carimi's confidence has also been noted, proclaiming himself as the best tackle in the draft. Bill Polian loves confidence in lineman, and also is known for drafting players (especially linemen) from the Big Ten.
Carimi's "weakness" is his pass blocking, where his occasionally sloppy footwork gives him trouble. However, this is not a natural problem, as Carimi has good later speed, but more of a technique issue. This could hopefully be remedied with quality coaching in the NFL. Carimi has gone against some very good competition, and has had success.
While he has been described as a better option at right tackle, he certainly has the tools to be great at left tackle. At the very least, he could be a great replacement for Diem on the left side, and if he is available at number 22, the Colts shouldn't hesitate to snap him up.