Rizal Golden Coolers (2022) In 2022, Mendoza forwent his final playing year with Ateneo, choosing to go professional by joining the
Rizal Golden Coolers of the
Maharlika Pilipinas Basketball League. He led the team's scoring after averaging 13.6 points, 2.9 rebounds, and 1.7 assists.
Pampanga Royce (2022–2023) After his single season with Rizal, he then moved to the Pampanga Royce of the
Pilipinas Super League, where he also led the team in scoring. Mendoza then joined the
Converge FiberXers for the preseason PBA on Tour, as both the Royce and FiberXers shared the same management team. and in his rookie season, became part of the team's
first title run. == National team career ==