The NFL was unable to substantiate former Cleveland Browns coach Hue Jackson's allegations of incentivized tanking following a 60-day review, the league announced Monday.

"The investigation found no evidence to suggest that the Browns' four-year plan or the club's ownership or football personnel sought to lose or incentivized losses and made no decisions deliberately to weaken the team to secure a more favorable draft position," the NFL wrote in a statement.

Jackson tweeted in February that Browns owner Jimmy Haslam offered him "a good number" to lose games from 2016-17. He later recanted those claims.