SAN DIEGO _ Jaime Garcia, out. Jake Westbrook, out. Chris Carpenter, still out. And the Cardinals' rotation rolls on, no matter what Memphian is added. Lefthander Jon Gast, who features a changeup, has won his first two big-league starts in relief of Westbrook. Lefthander Tyler Lyons, a curveball specialist who made his major league debut Wednesday night in place of the injured Garcia, was even better than Gast.