(5/16): Despite having issues with putting runners on base for much of his career, the 40-year-old Rodney earned a one-year contract with the Diamondbacks in the offseason and was named the closer to open the campaign. Rodney has successfully converted 9-for-11 save chances to begin the season, but he's been far from dominant while doing so. He gave up a total of eight runs over 1.2 innings in his two blown saves and is still sitting on a 9.22 ERA for the season. Rodney's long-term experience (and success) as a closer has prompted manager Torey Lovullo to reiterate that the veteran would remain the team's ninth-inning man, but Rodney likely has less margin for error than he did coming out of spring training.
In the event Rodney is unable to right the ship, Hoover might rank as the top candidate to take over closing duties. Though he was awful last season with the Reds, Hoover has been generally reliable through his first 16 appearances with the Diamondbacks, allowing two home runs over 13.1 innings while generating a 20:7 K:BB and a 2.70 ERA.
Bradley, a former top starting pitching prospect, has emerged as the Diamondbacks' most dominant arm out of the bullpen this season, but Lovullo could prefer to keep using in him in high-leverage, multi-inning situations, a la Andrew Miller and Chris Devenski. Even if Bradley isn't in the mix for saves if Rodney is removed from the closer's role, he'll still carry plenty of value in deeper leagues thanks to his elite ratios. Bradley has posted a 1.45 ERA and 25:4 K:BB over 18.2 innings this season.
After Rodney, Wilhelmsen possesses the most prior closing experience in the bullpen, but he's submitted an unremarkable 4.50 ERA and 1.11 WHIP over 18 innings this season, which likely keeps him behind Hoover and Bradley in the pecking order for save chances.
Like Bradley, the aging De La Rosa has also enjoyed a nice revival since moving to a full-time relief role this season. He's supplied a 2.51 ERA and 15:6 K:BB ratio in 14.1 innings, and with a team-high six holds already under his belt, De La Rosa has gained a foothold in the seventh and eighth innings.