NFL scouts and player personnel directors will analyse the information to determine if their skills will translate to American football and whether to invite the players back to the US for individual workouts.
They will also examine footage from their NRL games.
Attending the LA session were scouts from the Jets, Eagles, 49ers, Kansas City Chiefs, Chicago Bears, Jacksonville Jaguars, Indianapolis Colts, Buffalo Bills, LA Rams, Cleveland Browns, Arizona Cardinals, Green Bay Packers, San Diego Chargers and the Seattle Seahawks.
The players' Australian manager Chris Orr said four NFL teams immediately expressed interest in Taumalolo and Holmes.
"We have had a lot of interest since the workout and it all seems extremely positive and well received," Orr said.
"I am now letting Jason and Valentine enjoy their much-deserved break."
Both players, who were inspired by rugby league international Jarryd Hayne's stint last year with the 49ers, said it would be a dream come true if they were signed by a NFL team.
They are contracted to their NRL teams for 2017 and say they will fulfil their contracts, but that could be tested if NFL teams attempt to entice them to the US for the 2017/18 season.
- AAP