Cardinals starter Michael Wacha turned in a stellar performance in his big-league debut Thursday night against the Royals.

Wacha, ranked as the team's No. 4 prospect according to MLB.com, pitched four scoreless innings before allowing a run-scoring single to Elliot Johnson in the fifth inning for his only damage of the night. The right-hander had his outing spoiled by a three-run rally from the Royals in the ninth inning. He yielded one run and two hits while striking out six in seven innings pitched as he settled for a no-decision.

Wacha is scheduled to make his next start Tuesday at home against Arizona.