MLB Trade Deadline 2012: Introducing the Newest Arizona Diamondbacks

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As Tuesday's trade deadline came and went, the Arizona Diamondbacks said goodbye to some prospects and fan-favorites alike, while introducing key pieces to the franchise's minor and major league squads.

Though not as high profile as the trades executed by NL West foes Los Angeles and San Francisco, the D-Backs nonetheless made some roster tweaks all in the name of vaulting this third place team into the postseason picture.

Here is a brief overview of the Diamondbacks gained—and those lost—during this season's trade period.

Goodbye to Ryan Roberts, Craig Breslow, Barry Enright

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Ryan Roberts: Traded to Tampa Bay, "Tatman" Ryan Roberts was perhaps the biggest casualty of this year's trade block. In a combined four years with the Arizona D-Backs, Roberts had played in 372 games, recording a .254 batting average and .737 OPS with 34 home runs and 133 RBI.

Craig Breslow: Traded to Boston, the D-Backs had just acquired this lefty reliever from Oakland prior to the 2011 in a deal that also sent Trevor Cahill to the desert. In 40 appearances with Arizona, Breslow pitched 43.1 innings, recording a 2.70 ERA and two wins to zero losses. His ERA-plus this season in Arizona was 159, a dramatic increase from his ERA-plus of 105 last season in Oakland.

Barry Enright: A farm-grown righty, Barry Enright was traded to the Los Angeles Angels of Anaheim for cash on July 24 after pitching the 2010 and 2011 seasons with the big league D-Backs. During that time, Enright picked up a 4.87 ERA and 7-11 record, a WHIP of 1.398 and ERA-plus of 86.

Now that the goodbye theme is complete, it is time to say "hello" to the following new Diamondbacks players.

Chris Johnson

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If you watched Monday's Diamondbacks vs. Dodgers game, you already know who Chris Johnson is.

Making his D-Backs debut, the former Houston Astros third baseman slugged a grand slam to open up what was then a 3-0 Arizona lead. Nonetheless, Johnson debuted with Houston in 2009, working his way to a career batting average of .274, OPS of .735 and OPS-plus of exactly 100.

With a career total 27 homers and 140 RBI, Johnson should become a consistent piece at the hot corner, whose low $495,000 salary will entice GM Kevin Towers to keep Johnson out west.

Matt Albers

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To replace Craig Breslow in the bullpen, the D-Backs acquired Red Sox pitcher Matt Albers, a career 21-29 pitcher with a 4.78 ERA and 92 ERA-plus. Albers is a third-year, arbitration eligible reliever who currently plays on a one-year, $1.08 million contract and though his career numbers have been below average, recent trends suggest promise.

For Boston in 2012, Albers has recorded a 2.29 ERA in 39.1 innings pitched, pulling out a 1.14 WHIP and sizzling 192 ERA-plus. 

Albers might not be as consistently strong in the pitching department as Breslow, but this trade comes with a consolation prize...

Scott Podsednik

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...named Scott Podsednik, another outfielder for Arizona, who builds upon the depth of the position, having stopped by the NL West briefly during a 2010 stint with the Los Angeles Dodgers.

In his 11-year career, Podsednik holds a .281 batting average with a .724 OPS. His 42 homers and 307 RBI do not suggest strong power numbers, though Podsednik was an All-Star with Chicago in 2005, a year, coincidentally, in which he did not hit one single dinger.

In 2012, Podsednik has fared well in Boston, taking a .387 batting average and .893 OPS (137 OPS-plus) with him as he bids farewell to Beantown.