SAN FRANCISCO -- The Giants placed right-handed reliever Sam Coonrod on the 10-day injured list with a right lat strain on Friday. Left-hander Sam Selman was recalled from the team's alternate training site in Sacramento to fill the roster spot ahead of the series opener against the Rangers at Oracle Park.

Coonrod, 27, allowed three runs over 3 2/3 innings in his first four appearances of the season. He gave up one run in the seventh inning of the Giants’ 12-7, 10-inning loss to the Padres on Thursday. After issuing a leadoff walk to Fernando Tatis Jr., Coonrod gave up an RBI double to Trent Grisham, though he escaped further damage by inducing three consecutive groundouts from Manny Machado, Tommy Pham and Jurickson Profar.

Manager Gabe Kapler said Coonrod was undergoing testing on Friday to determine the severity of his injury. The Giants opted to add Selman to their roster to increase their left-handed depth against the Rangers, whose lineup includes several talented lefty hitters, including Shin-Soo Choo, Rougned Odor, Joey Gallo and Willie Calhoun.

“He’s looked good in our secondary camp,” Kapler said of Selman. “He has the ability to come in and give us some length. That’s helpful for today. The Rangers run out a pretty lefty-heavy lineup, so Selman gives us a nice option.”

Selman, 29, made his Major League debut with the Giants last year and logged a 4.35 ERA over 10 1/3 innings.

‘Turn the page’
Kapler was ready to move on from his “mental screw-up” in Thursday’s loss. In the 10th, the Giants' first-year manager and pitching coach Andrew Bailey made back-to-back mound visits, forcing the struggling Tyler Rogers to stay in the game to face Austin Hedges.

“We’re going to continue to work diligently to make great decisions in the dugout and kind of turn the page from [Thursday] night,” Kapler said.

Ecker high on Luciano
Hitting coach Donnie Ecker raved about Marco Luciano, the Giants' No. 2 prospect per MLB Pipeline, during his pregame Zoom call with reporters on Friday. Luciano, an 18-year-old shortstop, was the youngest player in Summer Camp for San Francisco, but he made an impression with his work ethic and ability to make quick adjustments.

“There’s a fire inside of him,” Ecker said. “He’s got a really steely-eyed focus.”

Ecker said Luciano initially had trouble hitting sliders in camp, so he asked to hit off the slider machine to address that deficiency. He also had a tendency to foul off four-seam fastballs that rode up in the zone, so he worked with the club’s hitting coaches to develop a better game plan for those types of pitches. Shortly after, Luciano crushed a high fastball from reliever Rico Garcia out to left field for a home run during batting practice.

“It told us a lot about the aptitude there,” Ecker said. “You combine that with the story of the slider machine, and I think those are all little details that add to some of the narrative around him.”