Frederick "Derrick" Santos Pumaren, is a Filipino basketball head coach for Akari Sparks in the Women's Maharlika Pilipinas Basketball League (WMPBL). He coached several teams in the UAAP, PBA, and PBL.

Pumaren was a member of the UE Red Warriors 1978 championship team.

While being an assistant, Pumaren led the Magnolia to six Philippine Amateur Basketball League championship.

Pumaren was hired an assistant coach for San Miguel Beermen led by then import-coach Norman Black. But when the People Power Revolution occurred and the Beermen was left the league for a while, he worked for Tanduay Rhum Makers under coach Arturo Valenzona and won back-to-back championship in 1987, but lost in the third conference and spoiled their chance to swipe the prestigious Grand slam. He returned as an assistant coach in 1987. When Norman Black returned, this time as a full-time head coach, Pumaren helped the Beermen to win four championships, including the 1989 grand slam.

In 1986, the Magnolia/SMB returned to the league in the last conference of the season, Pumaren was appointed as head coach, but placed last in the standings.

Pumaren became the head coach for the De La Salle Green Archers in the UAAP from 1986 to the early 90s, piloting the team to its first UAAP finals appearance in 1988, and first championship in 1989 and repeating in 1990. He also called the shots for the 1991 La Salle team in a controversial UAAP championship game win over FEU in 1991.

Pumaren led the Philippine team (RP-5) into a silver finish against Malaysia in 1989 Kuala Lumpur Southeast Asian Games.

Pumaren led Triple-V Restaurant into three PABL championships.