Rafael Duizit Mentzingen (born 2 May 1996) is a Brazilian footballer who plays as a midfielder or forward for USL League One club North Carolina FC.

Born in Rio de Janeiro, Mentzingen came to the United States to play collegiate soccer at Bryan College.

Mentzingen was selected in the fourth round of the 2019 MLS SuperDraft, but instead signed for USL League One club Lansing Ignite, with who he made his professional debut in 2019.

[7] After scoring four goals in a two-match stretch in mid-October, Mentzingen was named as the Appalachian Athletic Conference Offensive Player of the Week.

[16] He scored his first Crusader goal a week later, helping Valpo defeat nationally ranked Loyola in the program's Missouri Valley Conference (MVC) debut.

[21] Following his freshman season at Bryan, Mentzingen was on the roster for Premier Development League club Southern West Virginia King's Warriors.

[27] Mentzingen moved across the state of Michigan in 2018, joining fellow National Premier Soccer League club Detroit City for the summer season.

[28] After appearing for the club in preseason, he made his competitive debut for Le Rouge in the first round of the 2018 U.S. Open Cup, starting and playing 113 minutes as Detroit knocked out Michigan Bucks on penalties.

Although he had already signed a contract with Lansing Ignite, Mentzingen was drafted 90th overall in the 2019 MLS SuperDraft by Columbus Crew SC, who retained his Major League Soccer rights through the end of the 2020 season.

The sides agreed that Mentzingen would sign with Lansing for the 2019 USL League One season and join the Crew for preseason in 2020 to battle for a roster spot.

He scored two goals and provided three assists, including a stoppage time tally as part of a 3–2 victory over Forward Madison on 9 July.

[38] Nine days after Lansing was eliminated from the playoffs, the club folded due to financial difficulties; Mentzingen was therefore released from his contract and became a free agent.

[44] His contract with Memphis expired at the end of the season, with rumors from his native Brazil stating that he was the subject of interest from Campeonato Brasileiro Série B clubs.

[46] He missed the first seven games of the season due to an undisclosed injury, eventually making his club debut on 26 June against Greenville Triumph.

In the semifinals of the 2021 USL League One Playoffs, he played all 120 minutes as the Red Wolves were eliminated in extra time by Greenville.