Dela Rosa grew up in San Diego, California and his favorite sport was originally baseball, where he played as third-baseman and at times catcher.

[2] Dela Rosa played collegiate basketball at San Beda College, where he was a vital cog to four straight NCAA titles for the Red Lions.

On July 5, 2015, in Alaska’s series-clinching 82–77 win over the Star Hotshots, he played the best game of his young career, as he scored 11 points on 4-for-5 shooting in 31:45 minutes of action.

[8] Dela Rosa stayed for one more conference with Alaska, the 2016–17 Philippine Cup, but wasn't able to play due to a quadricep injury before being traded.

[9] On December 9, 2016, Dela Rosa was traded by the Alaska Aces to the Star Hotshots in exchange for Jake Pascual.

[11] In a 2017–18 Philippine Cup win over the NLEX Road Warriors, Dela Rosa had what was then his career-high 14 points with crucial baskets in the fourth quarter.

[20] He then scored 19 points by making all six of his shots from the field along with four rebounds, but went 3-of-7 from the free throw line as they lost to Rain or Shine.

[32] In a "Manila Clasico" against Barangay Ginebra, Dela Rosa led the team with 18 points but they still lost their third straight, slipping to 3–4 in the Governors' Cup.

[38] Dela Rosa got to display his two-way play in a win over Alaska during the Philippine Cup, scoring 12 points on four three-pointers, and making a crucial steal in the final 20.6 seconds of the game that to Ian Sangalang's game-winning basket.

[39] In Game 6 of their semis against the Meralco Bolts, he scored 16 points and made five three-pointers, sending Magnolia back to the finals.

In their third game, against the Batang Pier, Dela Rosa struggled as he couldn't make a single field goal in seven attempts.

[51] In Game 6 of the 2024 Commissioner's Cup finals, Dela Rosa committed a five-second violation in the fourth quarter that led to San Miguel beating Magnolia once again.

He is also the nephew of Ruben dela Rosa, also a PBA and MBA player, who was a teammate of former Alaska coach Alex Compton during his time with the Manila Metrostars.