Rivera: 'I'm not going out like this'

If Mariano Rivera was noncommittal about his future after a potentially career-ending injury Thursday, he did not mince words Friday.

"I'm coming back. Write it down in big letters. I'm not going out like this," the all-time major league saves leader told reporters prior to the Yankees' game against the Royals.

Rivera was carted off the field Thursday after suffering a torn ACL while shagging fly balls during batting practice. Many -- including Rivera himself -- questioned whether or not the 42-year-old would ever take the mound again.

Asked Thursday if his career was over, Rivera had replied: "I don't know."

He was far more upbeat Friday. "Thank you fans, friends and family for your prayers, well wishes and support," the dominant righty posted on his Twitter account.

"I will be ok. I will be back," he added.

If Rivera returns, he would be continuing an illustrious career that includes a 76-58 record with a 2.21 earned run average, 608 saves and 1,119 strikeouts in 18 seasons -- all with New York.