Ferrer played for the Tiger Cubs from 2009 up to 2010. In his rookie season with the Tiger Cubs, Ferrer was crowned the Junior's Rookie of the Year. Ferrer along with season MVP Ron Javier led the Tigers into a second-place finish at the end of the eliminations. Unfortunately, the Tiger Cubs were eliminated by the Kiefer Ravena-led Ateneo Blue Eaglets squad in the Final Four despite having a twice-to-beat advantage against the Eaglets. In his final season with the Tiger Cubs, Ferrer was crowned the Junior's Most Valuable Player where he led the Tiger Cubs into the Finals where they faced off once again with Ravena and the Blue Eaglets who finished the elimination round undefeated at 14–0 with an automatic Finals berth and a 1–0 advantage in a virtual best-of-5 final series. In Game 1, Ferrer led the Tiger Cubs with 35 points as the Tiger Cubs took Game 1 77-71 to even up the series 1-1, but the Tiger Cubs lost the next two games 66–76, 59–76 and the series as the Blue Eaglets pull off a three-peat in the Junior's division of the UAAP.
College career
Rookie season
Despite offers from different universities, Ferrer stayed with his alma mater and suited up for the Tigers in 2011. In his rookie season, Ferrer averaged 7.6 points per game, 5.2 rebounds per game and 1.2 assists per game. Stepping up in the second round of eliminations together with veterans Jeric Teng, Jeric Fortuna, Chris Camus and fellow rookie Karim Abdul, Ferrer and the Tigers finished the season in 4th place with an 8–6 record and returned to the Final Four. In their Final Four, Ferrer once again faced off against Kiefer Ravena and the Ateneo Blue Eagles, this time in the senior's division. Ferrer scored 10 points, but his efforts came up short as the Tigers were knocked out by the Blue Eagles to advance to the Finals 66–69.
Second season
In his second season with the Tigers, Ferrer led the Tigers back to the UAAP Finals in the Final Four with a season-high 17 points as the Tigers defeat the NU Bulldogs to advance to the UAAP Finals 63–57. The Tigers were able to advance to the UAAP Finals and faced off against the Ateneo Blue Eagles but were swept in the Finals 2–0 as the Blue Eagles completed their five-peat. Ferrer finished his sophomore campaign averaging 6.4 points per game, 4.5 rebounds per game and 1.2 assists per game. In the Philippine Collegiate Champions League later that year, Ferrer would play a key part in the Tigers run in the tournament as they first won the Metro Manila-Luzon tournament by defeating both the Letran Knights and the Adamson Soaring Falcons to enter into the PCCL Final Four with the Ateneo Blue Eagles, San Beda Red Lions and the Southwestern U Cobras. The Tigers would finish with a 2–1 record in the Final Four to set up a rematch with the Blue Eagles in the Finals, where the Tigers exacted their revenge against the Eagles as they were crowned the National Champions after winning the title in a tightly contested three game series.
Third season
In his third season with the Tigers, Ferrer would continue his role as the primary wing defender for the Tigers clamping down on defense over top scoring options on opposing teams. Ferrer though struggled with his offense throughout the season. However, he would break out of his slump in the Final Four against the top-seeded NU Bulldogs where he led the Tigers in scoring in both games while clamping down on defense against Bulldogs star Ray Ray Parks as the Tigers made history by becoming the first #4 seeded team to knock out a #1 seed in the UAAP Final Four to advance to the UAAP Finals for the second straight season. In Game 1 of the UAAP Finals against the De La Salle Green Archers, Ferrer would once again top the scoring for the Tigers as they escaped with a 73–72 win to go up 1–0 in the series. However, Ferrer would struggle in the next two games as the Archers recovered to win their first UAAP title since 2007. Ferrer improved his numbers during the season averaging 12.2 points per game, 7.4 rebounds per game and 1.9 assists per game on 46% shooting from the field and 70% shooting from the free throw line.
Fourth season and injury
In his fourth season with the Tigers, with new head coach Bong dela Cruz taking the helm from Pido Jarencio. Ferrer played the first eight games of the season giving them a 4–4 record and their chances of returning the Final Four still in play. However, Ferrer suffered a fracture on his left hand in practice which caused him to miss the rest of the season as the Tigers missed the Final Four for the year. Ferrer had career lows in his offensive he production as he only averaged 9.6 points per game and shot 24% from the field and 17% from 3-point range. He also averaged 5.3 rebounds per game, 1.3 assists per game and 1 steal per game.
Final season
Ferrer was able to carry his team to the finals but lost to the FEU Tamaraws. In Game 2 he placed 6 three-pointers in which the Tigers were able to force Game 3.
