Inciarte, 25, hit .303 (159-for-524) with six home runs, 45 RBI and 21 stolen bases in 132 games with the Diamondbacks last season. The 5-foot-10, 190-pound native of Maracaibo, Venezuela, made starts at all three outfield positions (56 starts in right field, 42 in left field, 18 in center field) in 2015 and finished with 10 assists, the fourth most among National League outfielders. Across all three positions, Inciarte compiled 29 defensive runs saved, which ranked as the second most in baseball behind only Tampa Bay's Kevin Kiermaier's total of 42. Since making his Major League debut in 2014, Inciarte has 52 defensive runs saved, the third most among outfielders in that span.
Originally signed as a non-drafted free agent by Arizona in 2008, Inciarte was selected by Philadelphia in the 2012 Rule 5 Draft, but returned to the Diamondbacks in April of the following year. He finished fifth in the Rookie of the Year voting in 2014 after hitting .278 (116-for-418) with four home runs, 27 RBI and 19 stolen bases in 118 games. In his two big league seasons, the outfielder has hit .292 (275-for-942) with 10 home runs, 72 RBI and 40 stolen bases in 250 games.
Blair, 23, split last season between Double-A Mobile and Triple-A Reno, combining to go 13-5 with a 2.92 ERA (52 ER/160.1 IP) in 26 games (25 starts) while earning a trip to the Southern League Mid-Season All-Star Game. The 6-foot-4, 220-pound native of Las Vegas, Nev., began the year with the BayBears before a June promotion to Reno. MLBPipeline.com ranked Blair, the 36th-overall pick in 2012 out of Marshall University, as the third-best prospect in the Diamondbacks organization and 61st in all of baseball.
Swanson, 21, was the first-overall selection in the 2015 First-Year Player draft out of Vanderbilt University. He appeared in 22 games for Single-A Hillsboro after signing, and hit .289 (24-for-83) with one home run and 11 RBI. The 6-foot-1, 190-pound native of Marietta, Ga., led Vanderbilt to consecutive College World Series appearances the past two years, helping the Commodores to their first-ever championship in 2014 and a runner-up finish this past season. MLBPipeline.com ranked Swanson as the 10th-best prospect in the game and Arizona's top minor leaguer.
Miller, 25, went 6-17 with a 3.02 ERA (69 ER/205.1 IP) in 33 starts for the Braves last season. Speier, acquired on November 20 from Detroit, spent last season with Single-A West Michigan, pitching exclusively in relief and going 4-2 with a 2.86 ERA (14 ER/44.0 IP) in 33 games.