The Giants added a fresh arm to their bullpen Monday ahead of their series opener against the Rockies at Coors Field, calling up left-hander Andrew Suárez and optioning right-hander Andrew Triggs.

Triggs, who walked the bases loaded in his season debut against the Rangers on Sunday, will remain on the Giants’ three-man taxi squad, along with right-hander Dereck Rodríguez and catcher Chris Herrmann.

Suárez, 27, will be available to pitch multiple innings in relief and could match up well against the Rockies’ lineup, which skews left-handed. The Giants’ bullpen now has seven lefties as Suárez joins former Rockies starter Tyler Anderson, Caleb Baragar, Conner Menez, Tony Watson, Wandy Peralta and Sam Selman.

“Their general lean is to stack lefties, even at the bottom of the lineup,” manager Gabe Kapler said of the Rockies. “It's not always going to be like that, and, of course, they're going to consider our roster when they produce their lineups. But given the left-handed power, given their most regular lineup that they've thrown out there thus far, it does make some sense to lean in the direction of left.”

Colorado had lefty bats David Dahl, Charlie Blackmon, Daniel Murphy, Ryan McMahon and Tony Wolters in the starting lineup Monday against Giants right-hander Johnny Cueto.

While Rodríguez has a track record of success in Colorado, with a 1.88 ERA over three career appearances at Coors Field, Kapler said the right-hander is unlikely to start in place of left-hander Drew Smyly (left index finger sprain) on Thursday. Anderson, who logged a 4.69 ERA overall over four seasons with the Rockies, seems more likely to take Smyly’s spot in the rotation.

Corner to corner
Alex Dickerson and Steven Duggar swapped outfield spots on Monday, with Duggar starting in left field and Dickerson manning right. The Giants felt the switch would give them a stronger defensive alignment at Coors Field.

“Left field is a big challenge here,” Kapler said. “It's a ton of ground to cover between center and left. Duggar, his speed, the center-field history, and his ability to play any outfield position gave us the confidence to make that move.”

It was only the second Major League start in right field for Dickerson, though Kapler noted that the 30-year-old slugger feels comfortable playing the position. Mike Yastrzemski has settled in as the Giants’ everyday center fielder, starting all but one game in the middle of the outfield.

Farm report
Kapler said outfielder Heliot Ramos and infielder Will Wilson are among the prospects who have continued to impress farm director Kyle Haines at the club’s alternate training site in Sacramento.

Ramos, ranked by MLB Pipeline as the Giants' No. 3 prospect, is fully recovered from a leg infection he sustained during Summer Camp and has made promising “plate-discipline improvements,” according to Kapler. Wilson, the club's No. 10 prospect, drew praise for his positional versatility after seeing time at shortstop, second base and third base.