SCOTTSDALE, Ariz. >> Left-hander Erik Miller made his first appearance of Cactus League play on Saturday at Scottsdale Stadium after dealing with a pair of setbacks, tossing a scoreless inning and striking out three batters as the Giants beat the Royals, 7-3. His spot on the Opening Day roster has long been secure. The Giants are still trying to determine whether he’ll be the only lefty in their bullpen come Opening Day.

San Francisco entered spring training with Miller as the only left-handed reliever on their 40-man roster. Halfway through Cactus League games, that remains the case. Last week, the Giants re-assigned left-handed non-roster invitees Raymond Burgos, Miguel Del Pozo and Ethan Small to minor-league camp, leaving Joey Lucchesi, Enny Romero, Antonio Jimenez and Helcris Olivarez as the remaining left-handed relievers in camp.

“It’s definitely interesting,” Miller said earlier this spring. “Those are obviously decisions that are way above my pay grade. ... Obviously, it’s not conventional. That’s the obvious thing. When you play teams that have a lot of (left-handed hitters), it’s usually beneficial to have more than one. I can only throw so many games in a row. It’s definitely open and I think it would probably help. We have a lot of lefties here who are super talented.”

Manager Bob Melvin said things are “up in the air” when asked if the Giants are leaning towards having two left-handers in their bullpen.

“I don’t think at this point in time, anybody has stood out yet,” Melvin said on Friday before the Giants’ game against the Reds was rained out.

Of the four left-handed non-roster invitees remaining, Lucchesi and Romero are the only two with major-league experience. And of those two, Lucchesi has an advantage in that he pitched in the majors last year whereas Romero’s last appearance in the big leagues was in 2018.