[4] In Season 90, he was one of the notable snubs from the NCAA All-Star Game, despite averaging 11.8 points, 5.5 rebounds, 3.6 assists, and 1.9 steals.

[13] Grey applied for the 2015 PBA Draft, but his application was voided for not meeting the minimum requirement of D-League games played.

[19] Grey was among seven players involved in a trade with Meralco, the NLEX Road Warriors, the TNT Katropa, and the GlobalPort Batang Pier.

[19] In his second season, Grey got to start for the Batang Pier when Terrence Romeo was injured, and scored 13 points in a loss to NLEX during the 2017-18 PBA Philippine Cup.

[22] In Game 1 of their quarterfinals series against the Rain or Shine Elasto Painters, he scored 22 points, including a game-winning three from the corner.