This will mark the season debut for Turner, who missed the first 40 games of the year after suffering a non-displaced fracture in his left wrist on a hit by pitch on March 19.
On Tuesday in Miami, Turner bats third and Forsythe seventh for the Dodgers.
Turner was 0-for-6 with a walk in his two minor league rehab games with Class-A Rancho Cucamonga over the weekend, playing one game at third base and another at designated hitter. Forsythe played three games with the Quakes, two at second base and another at DH, and was 1-for-10.
Dodgers third basemen are hitting .207/.289/.371, 28th in the majors in wRC+ (80), OPS and slugging percentage, 27th in batting average and 26th in on-base percentage.
Forsythe has been out since April 14, missing 27 games with right shoulder inflammation. He started 12 of the first 13 games of the season, including 10 starts at third base filling in for Turner. Forsythe this season is 8-for-46 with a home run and two doubles, hitting .174/.224/.283.
He figures to split time at second base with Chase Utley, who is hitting .258/.356/.393 this season and has started 22 of 40 games at second.
To make room on the active roster the Dodgers optioned Kyle Farmer and Tim Locastro to Triple-A Oklahoma City.
Farmer made the opening day roster and appeared in 30 of the Dodgers’ 40 games, starting 14 times at third base. Farmer also caught one game in reserve, spending two innings behind the plate.
He hit .230/.304/.279 with three doubles, and was 5-for-14 (.357) with a double as a pinch hitter.
Locastro appeared in eight games with the Dodgers, starting three times in center field, and was 2-for-11 (.182) with a double and two walks.