Ryan Lochte Tears Up ... 'I Let My Team Down'

Ryan Lochte fought back tears as he confessed ... he screwed over his teammates by going nuts at a Rio gas station and then lying about it.

Matt Lauer asked Lochte about the difficulties fellow swimmers Gunnar Bentz and Jack Conger had when they tried getting out of Rio ... Lochte seems way more contrite than he did in his statement where he hedged on fault.