The impressive Mexican controlled the fight against the Puerto Rican veteran for 12 rounds in a near shut-out performance.
The three judges scored the contest 120-107, 119-109 and 119-109 to hand an easy victory to the 26-year-old who moves to 24-0-1 (13 KOs).
On the undercard,
De La Mora was down in the second and the sixth before failing to return from his corner for the ninth.
Meanwhile in San Juan, Argentina,
It was the first time that Narvaez has returned to the ring since losing his unbeaten record to Nonito Donaire in New York last October.
Narvaez's new record stands at (36-1-2, 19 KOs)