Conversation so far:
How did the 2015 season start with Johnny Manziel?
On August 27, Johnny Manziel was ruled out for the rest of the preseason due to his right elbow.
What was wrong with Johnny Manziel's right elbow?
Johnny Manziel had recurring pain with his right elbow.
Did Johnny Manziel have any other injuries besides his right elbow in the 2015 season?
Are there any other interesting aspects about Johnny Manziel during the 2015 season with the Cleveland Browns?
Johnny Manziel was demoted to third-string quarterback behind McCown and Austin Davis a week later after videos surfaced of him partying in Texas over the bye week.
Was Johnny Manziel's 2015 season with the Cleveland Browns successful?
What happened after Johnny Manziel was demoted in the 2015 season?
Because of the demotion, Johnny Manziel remained benched in favor of Davis when McCown suffered a season-ending collarbone injury in the subsequent game against the Baltimore Ravens.
Did Johnny Manziel leave after he remained bench from his demotion?
Johnny Manziel was promoted to starter again after the Bengals defeated the Davis-led Browns 37–3.

Question: What has he done since?
Self-contained rewrite: What did Johnny Manziel do since he was demoted in the 2015 season?