[3] Felongco played youth football in the PFF National Men's U-23 Championship in 2011, scoring in the semi-final and leading the team to the final where they lost heavily to NOFA.
In 2013, he earned the "Best Defender" award as UST lost to De La Salle University in the semifinals in Season 76 of the UAAP.
At the end of the 2015 United Football League season, it was announced that Felongco would leave Stallion in favor of fellow UFL club Kaya FC,[14][15][3] who were competing in the AFC Cup for the first time.
[17] In 2021, Kaya qualified for the AFC Champions League for the first time, with Felongco coming off the bench in a 5–0 loss to Viettel FC.
[25] In July 2016, Felongco received his first call-up for the Philippine senior team in an unofficial friendly against A-League side Perth Glory.