Murray says he is following his heart to play football.
Murray was selected with the ninth overall pick of last year's MLB Draft by the Oakland Athletics, who agreed to let Murray play the 2018 football season with the Sooners. But, hey, that's the risk they took in drafting Murray and hoping that they could convince him to stick with baseball.
"Things have certainly changed since the draft", Billy Beane, Oakland's executive vice president of baseball operations, said before the announcement. He wants to play in the NFL rather than pursue a Major League Baseball career.
Oklahoma Sooners quarterback Kyler Murray raises the MVP trophy after defeating the Texas Longhorns in the Big 12 Championship at AT&T Stadium in Arlington, Texas, Saturday, December 1, 2018.
Moreover, while Murray the football player would have the opportunity to increase his earnings significantly after three years in the NFL, Murray the baseball player would enter a system that doesn't reward the most productive years of a player's life.More news: O'Rourke, Trump to headline dueling Texas border town rallies
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Murray's standout season put him onto the radars of National Football League teams despite his diminutive stature - Murray stands just below 5-foot-10. "Something like that is something that is part of our private discussions".
ESPN's draft experts, Mel Kiper and Todd McShay, both project Murray as a first-round pick.
Murray, who attends the University of Oklahoma, announced his decision in a Twitter post just four days before he was scheduled to report to the A's spring training program. He was expected to received other $3.16 million of his bonus March 1, but obviously now forfeits that. He will reportedly repay $1.29m (£1m) of the $1.5m (£1.17m) he received past year and forfeit the remaining $3.16m (£2.46m).
If football does not pan out, the A's are likely to welcome Murray back, said Susan Slusser of The San Francisco Chronicle.