India, March 14 -- Dak Prescott is nervous. The Dallas Cowboys quarterback fears that his bitter split with ex-fiancee Sarah Jane Ramos could cost him his career, and take away his onlu chance of winning a Super Bowl, Daily Mail reported, citing sources. This comes days after it was first revealed that Ramos broke up with Prescott at a joint bachelor and bachelorette party in the Bahamas. The two reportedly had a full blown argument after Ramos found that her future husband was sending messages to other women from a secret social media account.

The matter is still not settled. Neither Dak nor Sarah have made any public statements. One source close to the Cowboys star told the Daily Mail: "Dak can dish it out himself but one thing he isn'...