The Rams and Parkinson agreed to terms of a three-year, $22.5 million contract Monday, Adam Schefter of ESPN reports.
Parkinson finished the 2023 season with 25 receptions for 247 yards and two touchdowns through 17 games.
Parkinson caught three of four targets for 17 yards and a touchdown in Sunday's 20-17 win over the Titans.
Parkinson caught both of his targets for 28 yards and a touchdown in Sunday's 28-16 loss to the 49ers.
Parkinson (biceps) doesn't have a designation for Sunday's road game against the Rams, Sarah Barshop of ESPN.com reports.
Parkinson caught his lone target for a three-yard gain in Sunday's 29-26 win over the Commanders.
Parkinson (biceps) is active for Sunday's matchup with the Commanders.
Parkinson (biceps) is questionable for Sunday's game against the Commanders, Bob Condotta of The Seattle Times reports.
Parkinson caught his lone target for a six-yard gain in Sunday's 37-3 loss to the Ravens.
Parkinson wasn't targeted in Sunday's 24-20 win over the Browns.