Running back Todd Gurley is an alternate, a Rams spokesperson said.
Players are voted to the Pro Bowl by players, coaches and fans.
Donald, 28, has made the Pro Bowl every year since the Rams selected him with the 13th pick in the 2014 NFL draft.
Donald, a two-time NFL defensive player of the year, has not had the statistical production of the last two seasons. In 2018, for example, he had 20½ sacks, the most by an interior defensive lineman in NFL history.
This season, Donald has 11 sacks with two games remaining. The Rams (8-6) play the San Francisco 49ers on Saturday at Levi’s Stadium. They conclude the regular season Dec. 29 against the Arizona Cardinals at the Coliseum.
To reach the playoffs, the Rams must win both games and the Minnesota Vikings must lose home games against the Green Bay Packers and Chicago Bears.
Ramsey was voted to the Pro Bowl despite being traded to the Rams in October.
The Rams acquired Ramsey from the Jacksonville Jaguars a few hours after they traded cornerback Marcus Peters to the Baltimore Ravens. Peters, who has returned three of his five interceptions for touchdowns, was voted to the Pro Bowl for the third time.
Ramsey, the fifth pick in the 2016 draft, has no interceptions this season. His Pro Bowl selection is a testament to the respect he has earned from opponents as perhaps the NFL’s top cover corner.
Gurley, a Pro Bowl selection in three of his first four NFL seasons, has rushed for 741 yards and 10 touchdowns. He has 29 receptions, two for touchdowns.