The Champion by Scott Sigler

After his most successful season yet on the field, Quentin sister - his only family - is lost in the Portath Cloud, an area considered to be the "Bermuda Triangle" of the galaxy. To save her, Quentin and his teammates must first escape team owner Gredok the Splithead, and acquire a ship capable of surviving the unknown dangers that await. Quentin's leadership and intelligence are put to the test as Becca, the Tweedy Brothers, Denver and more risk their lives to save his sister.