Use our BetMGM bonus code NEWSWEEK1500 to unlock the best welcome offer in your state. Win bonus bets or place a large wager on any college basketball game. Then, you'll find additional promotions on the "King of Sportsbooks."Place a $10 bet with our BetMGM bonus code in CO, MI, NJ, PA and WV. If it wins, you'll receive $150 in bonus bets. And a $1.5K first bet is available to new users in all other states. A loss will trigger a bonus refund, so you'll get a second chance.CBB Games for Our BetMGM Bonus CodePlace your initial wager on any of the second-round games on Sunday. Action begins with No. 8 UConn vs. No. 1 Florida, No. 9 Baylor vs. No. 1 Duke and No. 6 Illinois vs. No. 3 Kentucky. The Wildcats are 1.5-point underdogs, which is the tightest spread of the day.The remaining games are No. 7 Saint Mary's vs. No. 2 Alabama, No. 12 Colorado State vs. No. 4 Maryland, No. 6 Ole Miss vs. No. 3 Iowa State, No. 10 New Mexico vs. No. 2 Michigan State and No. 5 Oregon vs. No. 4 Arizona.Pick any game and go through the different markets to find your favorite spread, total, moneyline or prop. Try to find an easy winner to claim the $150 bonus or find the perfect market for an aggressive wager.BetMGM Underdog Boost, No-Sweat ParlayBetMGM has been releasing promotions every day for tournament games. On Sunday, you can increase your potential winnings with a profit boost on any underdog. Baylor is the biggest underdog of the day against a Duke team that has the best odds to win the title. Opt-in to the no-sweat parlay token to create a parlay on Sunday. You'll get your stake back in bonus bets after a loss.Make your picks throughout the tournament with March Matchups $250,000 Pick 'Em. Accumulate the most points to win a portion of the large prize pool.There are multiple offers for other sports, including the NBA. Bet on the NBA player who makes the most three-pointers to win a share of a $50,000 jackpot. NHL fans can predict a hat trick from a player to win part of a $10,000 bonus. And every bet you make on BetMGM will go toward earning perks through the loyalty program.BetMGM Bonus Code Guide for New UsersIt only takes a few minutes to sign up using our BetMGM bonus code. Take these steps to win bonus bets or make your favorite bet of the day. Register through our links to apply code NEWSWEEK1500. Enter your date of birth, full legal name and other info to confirm your identity. Deposit money into your account with an accepted payment method, such as a debit card or online banking. Place a $10 bet in select states or wager up to $1,500. A winning $10 bet in CO, MI, NJ, PA and WV will result in a $150 bonus. In other states, a loss of $50 or more will trigger five bonus bets as a refund. Each one will be 20% of your loss, so it can be split up for several games.Newsweek may earn an affiliate commission if you sign up through the links in this article. See the sportsbook operator's terms and conditions for important details. Sports betting operators have no influence over newsroom coverage.