Largest mlb contracts largest mlb contracts. Betts ’ deal with the dodgers weighs in as the second - largest contract in baseball history by total value. Mookie betts signed a 12 year, $365,000,000 contract with the los angeles dodgers, including $65,000,000 signing bonus, $365,000,000 guaranteed, and an average annual salary of $30,416,667. · los angeles (ap) — even before mookie betts played his first game in dodger blue, the superstar outfielder decided his future is in los angeles. · mookie betts joined the los angeles dodgers in the 2020 mlb season and won his second mlb world series title during his first year with the team, and then won his third world series in. Betts had been slated for free agency this. Betts and the dodgers have struck baseball ’s first big-money deal since the coronavirus pandemic decimated the sport’s economics, with betts agreeing wednesday to a $365 million, 12-year contract through 2032 on the eve of opening day. · betts new contract becomes the second largest in mlb history , behind only mike trouts 12-year, $430 million contract with the angels. Where does this deal rank in baseball history ? · the dodgers signed betts to a 12-year contract through the 2032 season, the team announced wednesday.