Nate Karns

Righthander Nathan Karns positioned himself to go in the first three rounds after flashing a 95-96 mph fastball and a plus curveball in the Cape Cod League last summer. After an inconsistent spring, he may go closer to the 10th round, where the Astros drafted him out of high school in 2006. "He looks like Roger Clemens in the bullpen," one scout said, "but he gets whacked." Karns has a strong 6-foot-3, 223-pound frame and showed a 91-94 mph fastball and hard curve in his second season at Texas Tech after transferring from North Carolina State. He's still figuring out how to pitch, as he has trouble throwing strikes and locating his pitches when he can find the zone. Scouts don't love his delivery and question his mental toughness.