Who's calling? <a href="http://twinforms.com/products/index.php/medcaremgcombr-ae77.pdf">medicarerxonline.com</a> Rivera made his major league debut as a starting pitcher in June 1995 against the Angels, yielding eight hits and five runs over 3-1/3 innings in a 10-0 loss. He and fellow rookie Derek Jeter were both optioned to Triple A immediately after.