Reggie Bush on Michael Sam -- 'It's Great!'

Reggie Bush says "it's great" that Michael Sam was drafted by the Rams yesterday ... becoming the first openly gay player in NFL history ... but tells TMZ Sports it's time to get to work.

Bush was leaving Boa Steakhouse in L.A. with his finacee Lilit when we asked about Sam -- a story so big, even President Obama called Michael to congratulate him.

Adam Lambert was also pumped for Sam -- saying the selection was "good news"... and explaining why the NFL is welcoming the reigning SEC Defensive Player of the Year with open arms.

While Reggie praised the move -- not everyone in the NFL has felt the same way. Miami Dolphins safety Don Jones tweeted "OMG" and "horrible" after Sam was selected. He has since taken the Tweet down.

The Miami Dolphins GM said he was "disappointed" by Jones' comments and explained, "This is not what we stand for as an organization."