During the 2011–12 Aspirants' Cup, he was involved in a freak accident in practice where his teammate poked his left eye.
[14] In the 2013 Governors' Cup, he stepped up in the semifinals by scoring 13 of his career-high 23 points in the fourth quarter of Game 3, as San Mig went on to take a 2–1 series lead.
[22] On October 31, 2016, during the offseason, Mallari was traded from the Star Hotshots to the Mahindra Floodbuster in exchange for Aldrech Ramos.
[23] In his team debut during the 2016–17 Philippine Cup, he had 17 points, nine rebounds, and two steals in a defeat to the GlobalPort Batang Pier.
[26] Mahindra finally got their first win of the season against the Blackwater Elite, in which he had a career-high-tying 23 points, 11 rebounds, four assists, and four steals.
[32] After a loss to Alaska, head coach Chris Gavina called him out for complaining too much on non-calls, which forced him to bench Mallari late into the third quarter.
[35] After a loss to Globalport, Coach Gavina called him and the rest of the team out for focusing too much on their stats and for a lack of maturity.
[36] During the 2017 Commissioner's Cup, he was traded to the NLEX Road Warriors along with Kenneth Ighalo and a 2020 second-round pick in exchange for Eric Camson and Glenn Khobuntin.
[38] He helped NLEX close out the conference with a win despite not qualifying for the playoffs, as he tallied 22 points, nine rebounds, five assists, two steals and two blocks over Phoenix.
[45] He had 17 points and nine rebounds against the Rain or Shine Elasto Painters, but NLEX still lost, their fourth straight.
[52] That conference, he was often the focal point of the offense as the team had lost star guards Kevin Alas and Kiefer Ravena to an ACL injury and an 18-month ban from FIBA respectively.
[54] In his Phoenix debut during the 2019 season, he played 35 minutes and contributed 11 points, eight rebounds, and five assists in a win over Meralco.
[59] During the 2019 Commissioner's Cup, he scored 10 of his 15 points in the fourth quarter and had the game-winning assist to Justin Chua against Alaska.