Floyd Mayweather puts his legacy and undefeated record on the line Saturday night when he steps into the ring against Saul “Canelo” Alvarez. Mayweather will receive a record guarantee of $41.5 million (Canelo is due $5 million) and is in line for a total payout millions more after all of the pay-per-view receipts are counted and “Money” Mayweather takes his cut. In a 17-year career full of monster paydays, it will be the biggest one yet, topping the $45 million, including his share of PPV revenue, for fightingMiguel Cotto in 2012. Mayweather’s cumulative career earnings will likely hit $350 million with the Canelo fight.