D-backs roster moves

The Arizona Diamondbacks (@Dbacks) made the following roster moves today:
Added to the 40-man roster
·         RHP Jake Barrett (24) - Is rated as the D-backs' No. 18 Prospect by MLB.com…currently playing with Team USA in the Premier12 Championship in Japan…went 4-3 with 15 saves and a 4.58 ERA (13 ER in 23.0 IP) in 47 combined relief appearances with Double-A Mobile and Triple-A Reno in 2015…in 4 Minor League seasons in the D-backs' organization, has totaled 78 saves and a 3.36 ERA (69 ER in 185.0 IP)…drafted by the D-backs in the third round of the 2012 First-Year Player Draft out of Arizona State University.
·         OF Gabby Guerrero (21) - Is rated as the D-backs' No. 14 Prospect by MLB.com…currently playing with the Salt River Rafters in the Arizona Fall League and batting .300 (15-for-50) with 2 home runs and 4 RBI in 13 games…acquired by from Seattle on June 3, along with C Welington Castillo, RHP Dominic Leone and INF Jack Reinheimer, for OF Mark Trumbo and LHP Vidal Nuño…combined to hit .222 (102-for-460) with 25 doubles, 5 triples, 7 home runs and 47 RBI in 126 games with Double-A Jacksonville and Mobile in 2015…participated in the 2014 MLB All-Star Futures Game at Target Field…is the nephew of former Major League All-Star Vladimir Guerrero.
·         RHP Matt Koch (25) - Acquired on Aug. 30 from New York-NL, with RHP Miller Diaz, for RHP Addison Reed…in 36 games (9 starts) with Double-A Binghamton and Mobile, went 5-8 with a 3.20 ERA (34 ER in 95.2 IP)…tossed 7.1 scoreless innings in a win in his lone outing with the BayBears on Sept. 3 @ Pensacola…2014 Florida State League mid-season All-Star…selected by the Mets in the third round of the 2012 First-Year Player Draft.
Designated for assignment
·         RHP Allen Webster
The D-backs 40-man roster is now at 40.