Gregory Shamus/Getty ImagesCam Davis defeated Troy Merritt, Joaquin Niemann and all three other players in a playoff to win the 2021 Rocket Mortgage Classic.Low scores were recorded by Detroit Golf Club throughout the week that led up to the fourth round of the Fourth-of- July. To keep up with the field and climb the leaderboard, it took a lot of birdies.Sunday's results were a success for all three leaders. They finished 18 strokes below par, which required an additional five holes to settle.Niemann was defeated by a bogey at the first playoff hole. A par at No. After Merritt's par-3 hole, Niemann lost on the first playoff hole. Davis won with 15 strokes.Final Leaderboard1. Cam Davis (18)T2. T2.T2. Joaquin Niemann (18)T4. Alex Noren (-17).T4. Hank Lebioda (-17).T6. T6.T6. Brandon Hagy (-16).T8. Mark Anderson (-15).T8. T8.T8. Seamus Power (-15).T8. Kevin Kisner (-15).PGATour.com has all the stats and results.It is not common to break the field with four rounds in the 60s, but Niemann Merritt, Davis and Davis did it and remained tied after 72 holes, at minus-18.The playoff was held, and Niemann was eliminated on the first hole. The 22-year old didn't make a bogey in four rounds but he did manage to score his first playoff bogey, which cost him his chance of winning.Davis had birdie putsts for the championship, but each missed.Merritt and Davis both parred the first three playoff holes, before Merritt birdied the fourth.Merritt made a mistake on the fifth playoff hole, missing the green on the par-3 and couldn't save par. After four days of outstanding action, Davis was crowned the champion despite the disappointing ending.Davis was one-under through five playoff holes, and ended his round with an impressive chip-in eagle on 17.An additional birdie on 18 earned the Australian a total of 67, good enough for him to win the round.Given the number of players in the race for a win, a playoff seemed almost certain. Merritt and Niemann started the day together as co-leaders. However, there were many players who managed to get at least a portion of the lead throughout.Bubba Watson, the first player in the clubhouse, was 16-under. This is a significant turnaround after just barely making it to Round 2.Alex Noren set the bar higher with his final round 64, which saw him score 17-under.The Swedish golfer was able to reach the green in regulation in 16 holes. He also excelled in his approach shots, which helped him match his lowest round on PGA Tour.Merritt, Hank Lebioda and Niemann eventually tied for the lead at plus-17. Cam Davis joined the group for a dramatic five-way tie.Further birdies by Merritt, Davis, and Niemann increased their total to 18 strokes below par. This forced them all into a playoff.Davis won the victory with five more holesThe John Deere Classic will begin in Silvis, Illinois on Thursday. However, many top golfers will begin to prepare for The Open Championship, which begins in Kent, England, on July 15.