A new book reveals that suspended New York Yankees slugger Alex Rodriguez was granted an exemption by Major League Baseball to use testosterone prior to his 2007 MVP season.

The book, "Blood Sport: Alex Rodriguez, Biogenesis and the Quest to End Baseball's Steroid Era" by Tim Elfrink and Gus Garcia-Roberts, and excerpted by Sports Illustrated, outlines that Rodriguez was granted a therapeutic use exemption (TUE) in order to treat hypogonadism (a testosterone deficiency), a rarity in the sport.

"In 2007, of the 1,354 players subjected to testing, 111 were granted a TUE," according to the book. "Only two, apparently including Rodriguez, received an exemption for 'androgen deficiency medications,' the category that would include testosterone."