Raymundo joined the PBA at the age of 19 when Red Bull made the decision to move to the PBA from the PBL making him the second youngest player to join the league. He played six games for Red Bull in his debut in the 2000All-Filipino Cup, but was banned by the league for the rest of the season after finding out that Raymundo falsified his requirements to enter the league. The league required players who have graduated from high school in 1996, while Raymundo graduated only a year later before going to Letran. He would later return in 2001 for the Thunder, becoming one of the vital cogs, along with Davonn Harp, Mick Pennisi, Jimwell Torion, former collegiate teammate Miller and import Antonio Lang, to lead Red Bull to their first championship over the San Miguel Beermen in the Commissioner's Cup.
In 2002, Raymundo was shipped to Purefoods. In his first year with the franchise, he led the team to a Governor's Cup championship. Raymundo also received the Finals MVP award under then-interim coach Ryan Gregorio. He was again instrumental in Purefoods' 2006 PBA Philippine Cup crown, along with James Yap, Peter June Simon and Marc Pingris. After Rey Evangelista retired in 2008, Raymundo assumed the role of team captain. He was sidelined with a knee injury when Purefoods took home the 2009–10 PBA Philippine Cup trophy. On March 28, 2011, Raymundo became the 63rd player to join the PBA’s 5,000-point club. On April 2, 2011, Raymundo became the 33rd player in PBA history to collect at least 2,000 defensive rebounds. On December 3, 2011, Raymundo became the 41st player in PBA history to collect at least 1,000 offensive rebounds.
Before the start of the 2012 Commissioner's Cup, B-MEG traded former team-captain and stalwart Raymundo to its sister team Ginebra and in turn acquired high flying forward J.C. Intal.
After Meralco got eliminated in the Governor's Cup Semifinals series against San Mig Coffee Mixers, the Bolts traded big man Jay-R Reyes for him. This trade reunites him with Ryan Gregorio, his former coach in Purefoods. The veteran Raymundo, who chose not to sign a contract with Meralco for the moment, has yet to play a single game for the Bolts. He has been sidelined by a complicated knee injury since the start of the 2013 Governors' Cup while he was still playing for the Gin Kings - an injury which would cost Raymundo around P4.5 million of his own money if he opts to undergo surgery in the US. Originally diagnosed as a mere bone bruise, the injury turned out to be a lot more serious when Raymundo had his knee checked in the United States last November 2013. The injury is the same one that sidelined New York Knicks power forward Amar'e Stoudemire for a long period. In May 2015, Raymundo announced his retirement, saying that although he is still capable of playing after he was cleared by his doctors to play, he no longer had the passion to continue playing basketball.
