The Arizona Diamondbacks have been one of the biggest surprises in this season, and remain firmly in the playoff picture. With the trade deadline fast approaching, focus shifts toward maintaining their postseason push by adding quality to their ranks. They have scored the sixth-most runs (490) in the majors. However, they rank only 24th in ERA(4.56). Hence, the rotation is expected to be under the microscope.Rumors, updates, and latest transactionsJuly 26Bob Nightengale of USA Today reported comments from the Diamondbacks General Manager, Mike Hazan, that they plan to be agressive. Particularly in improving their pitching staff.Bob Nightengale@BNightengaleArizona #Dbacks GM Mike Hazen wants to be aggressive and acquire pitching at the trade deadline, but says it's still difficult to read the market with so many teams on the bubble and undecided.26018Arizona #Dbacks GM Mike Hazen wants to be aggressive and acquire pitching at the trade deadline, but says it's still difficult to read the market with so many teams on the bubble and undecided.July 31 - Arizona Diamondbacks acquire Paul Sewald from Seattle MarinersThe Diamondbacks have traded for Mariners star closer Paul Sewald ahead of the 2023 MLB trade deadline. Sewald is likely one of the best relief pitcher options to be moved this season. In exhange they traded away a trio of talented prospects.Ken Rosenthal@Ken_RosenthalDiamondbacks IF Josh Rojas, OF/1B Dominic Canzone and IF Ryan Bliss going to Mariners for reliever Paul Sewald, source tells @TheAthletic. First with deal: @nickpiecoro480130Diamondbacks IF Josh Rojas, OF/1B Dominic Canzone and IF Ryan Bliss going to Mariners for reliever Paul Sewald, source tells @TheAthletic. First with deal: @nickpiecoroD-Backs acquire Jace Peterson - July 31The Arizona Diamondbacks have acquired infielder Jace Peterson from the Oakland A's in exchange for minor-league RHP Chad Patrick. Bob Nightengale@BNightengaleThe #Dbacks acquire #A's infielder Jace Peterson for minor-league RHP Chad Patrick.24432The #Dbacks acquire #A's infielder Jace Peterson for minor-league RHP Chad Patrick.