The set-up: The Giants bullpen (32 blown saves, including the postseason) was the team's Achilles' heel last year and they thought they addressed their bullpen woes by signing free agent closer Mark Melancon to a four-year, $62 million contract during the of-season. However, the "new-look" pen ruined a stellar outing by Madison Bumgarner in Sunday's 6-5 loss at Arizona. After Derek Law blew the save in the 8th, Melancon struggled in his first appearance as well, allowing two runs in the ninth, including a walk-off single to Chris Owings (blown save and loss!). "We never expect anything negative to happen with Mark out there," Giants manager Bruce Bochy told reporters. "It happened. You are not going to be perfect. We had our chances to put the game away a couple times and couldn't do it." The game was Arizona's first under new manager Torey Lovullo and center fielder A.J. Pollock had a two-run HR off Bumgarner and finished with three hits from the leadoff spot. Lovullo pushed all the right buttons in the ninth inning to secure the victory in his managerial debut, giving the D'backs their first walk-off victory in a season opener in the team's 20-year franchise history. The pitching matchup: The Giants will send Johnny Cueto (18-5 & 2.79 ERA in 2016) to the mound up against Arizona's Patrick Corbin (5-13 & 5.15 ERA). Cueto was as good as advertised in his first season with the Giants last year while throwing 219 2/3 innings with five complete games among his 32 starts (Giants were 23-9 and plus-$1056 at $100/game). Cueto is 9-3 with a 3.17 ERA in 13 career starts against Arizona (teams are 10-3). In stark contrast, Corbin had a dismal 2016 season that ended with a demotion to the bullpen. He had a 5.15 ERA and 1.56 WHIP in 24 starts, as Arizona was 7-17 in those starts, going minus-$892 vs. the moneyline. He's faced the Giants 14 times (team is 7-7), going 4-5 with a 3.60 ERA. The pick: The Giants have won 13 of their last 14 series against the Diamondbacks in Arizona and went 9-1 at Chase Field in 2016. Sunday's blown save is behind them and while Cueto arrived late to camp due to personal issues this spring, he appears to be in mid-season form after posting a 1.50 ERA in three spring training starts. Make the Giants