Marcelo studied and played for the San Beda Red Lions from 2007 from 2011 together graduated with Garvo Lanete and Mar Villahermosa.

On his last year with the Red Lions, they faced the JRU Heavy Bombers in the semifinals after beating San Sebastian Stags in the top-seed playoff.

In Game Two of the Finals, there was a hard-fought battle when they outscored the Stags in the low-scoring fourth quarter, 9–5, as Pascual missed a three-point field goal that could have won over the Red Lions as the Red Lions won, 57–55, to get their 16th championship, tying Letran.

[2] On September 21, 2023, Marcelo, along with a 2024 first-round pick, was traded to the Rain or Shine Elasto Painters for Henry Galinato and Jewel Ponferada.

In October 2023, he signed with the NLEX Road Warriors, reuniting him with his former college coach Frankie Lim.