An excerpt from the new book “Blood Sport: Alex Rodriguez, Biogenesis and the Quest to End Baseball’s Steroid Era” reveals that the embattled Yankees slugger used testosterone — a banned performance-enhancer — in 2007 with the consent of Major League Baseball under a therapeutic use exemption, or TUE.

The exemptions have been increasingly common in baseball in the days of drug testing. As recently as 2013, nearly 10 percent of major-leaguers had permission to use Adderall, a banned stimulant used to treat attention-deficit disorder.

But as the book excerpt presented in Sports Illustrated notes, testosterone exemptions are far more rare. Rodriguez was one of only two players granted a TUE for “androgen deficiency medications,” which include testosterone. In 2013, three MLB players had exemptions for hypogonadism, a condition in which the body does not produce sufficient testosterone.


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• San Diego outfielder Seth Smith signed a $13 million contract extension through 2016 after being told by ownership that it is committed to winning.

The deal was announced before Wednesday’s game against Cincinnati. It had been in the works since before general manager Josh Byrnes was fired on June 22 and it came together in the last few days.

Smith will make $6 million in 2015 and $6.75 million in 2016. The Padres hold a $7 million option in 2017, or a $250,000 buyout.

Smith is making $4.5 million this year. He was obtained in an offseason trade with Oakland.

• Colorado has acquired right-hander Jair Jurrjens from the Cincinnati Reds in exchange for minor-league first baseman Harold Riggins.