Arizona Diamondbacks insider Jack Sommers believes that the team's biggest roster hole isn't a splashy name. Sommers points to the Diamondbacks' struggles against right-handed pitching, suggesting a need for a reliable left-handed bat.

The Diamondbacks signed Campbell to a minor-league contract Dec. 5. In parts of three seasons in the majors, Campbell has collected a 5.65 ERA and 42:16 K:BB over 43 innings of work. The 28-year-old reliever will give the Diamondbacks some experienced bullpen depth at Triple-A Reno.

The Arizona Diamondbacks are rumored to be in the mix for Astros center fielder Jake Meyers. The cost to get him could be very high.

Herrera's signing has been reported by Daniel Alvarez-Montes on Monday. It's a minor-league contract with an invite to MLB spring training. A 28-year old, this is Herrera's first time with a new organization. He signed as an international free agent with the Arizona Diamondbacks in 2013 and had been in their system ever since.

Former Arizona Diamondbacks infielder Jake Lamb had been officially retired for mere days. Now, he'll begin a new chapter in his baseball journey — this time as

Boston Red Sox are reportedly serious contenders for Arizona Diamondbacks star Ketel Marte, a three-time All-Star second baseman. Talks are exploratory, with Boston seeking pitching reinforcements and Marte offering elite switch-hitting and middle-order power.