Both pitchers spent the 2012 season at Double-A Chattanooga with pitching coach Chuck Crim, who has since been promoted to the Dodgers' Major League bullpen coach. The Dodgers now have 38 players on their 40-man roster.
Ames, 24, was 3-3 with 18 saves and a 1.56 ERA in 54 games during the 2012 season. He struck out 72 in 63 1/3 innings and held right-handed hitters to a .177 average. Ames was a 17th-round pick in the '09 First-Year Player Draft out of Gonzaga University.
Magill, 23, went 11-8 with a 3.75 ERA in 26 starts in 2012, with 168 strikeouts in 146 1/3 innings. He was a 31st-round pick in '08 out of Royal High School in Simi Valley, having fallen in the Draft because of signability concerns. He was signed by Crim, who was scouting for the Dodgers at the time.
Among the players left unprotected by the Dodgers is outfielder Tony Gwynn, although any club taking him would also get his guaranteed $1.15 million salary.
Players who were signed when they were 19 or older and have played in professional baseball for four years are eligible for the Rule 5 Draft, as are players who were signed at 18 and have played for five years. Clubs pay $50,000 to select a player in the Rule 5 Draft, held at the conclusion of the Winter Meetings on Dec. 6 in Nashville, Tenn. If that player doesn't remain on the 25-man roster for the full season, he must be offered back to his former team for $25,000.
Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.