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Arizona Diamondbacks designate Allen Webster for assignment, add three to 40-man roster

The Allen Webster era appears to have ended in Arizona, with the news the right-hander was designated for assignment. They also added three names to their 40-man roster, protecting them from the Rule 5 draft.

Mark J. Rebilas-USA TODAY Sports

Allen Webster was part of the return from the Boston Red Sox, when we shipped them Wade Miley. But, unlike the other part of that deal, Rubby De La Rosa, Webster did not even show flashes of promise. Though I guess you could argue he provided a consistent level of performance, that's not good when the level in question is "suck". The 25-year-old made five starts and four relief appearances for the Diamondbacks, with a 5.81 ERA, and he was lucky to have that, with his FIP being 8.36. And that was close to the figure Webster posted with the Reno Aces in the minors, going 4-6 over 15 starts, with an 8.18 ERA.

For a 140-character or less summary of Webster's time with the Arizona Diamondbacks, we turn to Nick Piecoro:

Seems legit. If this is the end, then the last appearance for the Diamondbacks will be a fitting one: his inning in the 21-6 pounding at the hands of the Houston Astros, in which he allowed three earned runs.

Added to the 40-man roster are three names, which fills things up at the current time - though, of course, there may be additional moves made between now and the Rule 5 draft on December 10. Here's what the team had to say about the three names added to the list.

RHP Jake Barrett (24) - Is rated as the D-backs' No. 18 Prospect by 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.

So, let the "did you know Jake Barrett went to ASU?" jokes fly. Get them out of your system now. Please...

OF Gabby Guerrero (21) - Is rated as the D-backs' No. 14 Prospect by 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.