Playing at the Tournament of Stars can be nerve-racking. All eyes (and sometimes a couple dozen radar guns) are on the pitcher and there's a lot on the line, as the players involved are competing for 40 spots on the USA Baseball 18U trials roster.

Righthander Jamie Callahan from Dillon (S.C.) High experienced some of those nerves when he took the hill earlier in the tournament.

"I felt good, better than my start last time when I came in on Friday a little nervous and shaky," Callahan said. "I came in today with all the nerves gone. I waited my time to get back out there and throw in this wonderful environment out here."

Today, was a different story.

Callahan, who stands 6-foot-3 and 195 pounds, threw two perfect innings and racked up five strikeouts. His fastball sat in the 89-92 mph range and he showed a curveball and slider that were distinctly different pitches—and both were very effective.

"When I'm battling there and somebody's fighting off the fastball, I'll come with the slider," Callahan said. "That way it looks like a fastball and then just breaks on them. I like to use the curveball if they take the fastball and then just give them that different look that it's floating up there and then it breaks hard on them."

Callahan, a South Carolina commit, may have carried over the excitement of the Gamecocks winning the night before to the mound with him today.

"I stayed up the whole time and watched it," Callahan said. "It was more nerve-racking than being out there on the mound today."