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6/21/2013 1:40 A.M. ET

Pagan carted off field in first rehab game

SAN FRANCISCO -- Minutes before the Marlins scored a pair of runs that ultimately handed the Giants a 2-1 loss Thursday, San Francisco suffered what could be an even bigger one more than 80 miles away from AT&T Park.

Outfielder Angel Pagan, who has been absent from the team's lineup since May 25 with a strained left hamstring, had a setback during the first game of his rehab assignment with Class A San Jose at Stockton.

Pagan was unable to run out a grounder to second base in the ninth inning and had to limp to first base before collapsing to the ground. A cart took Pagan off the field.

"He came out of the game and we'll have to check on him tomorrow," Giants manager Bruce Bochy said after Thursday's game. "So it's a setback, but that's all I know."

Giants first baseman Brandon Belt was unaware of what had happened to Pagan following the Giants' loss, but said the setback could potentially be "devastating."

"He's a spark plug for us," Belt said. "You just kind of hope it's not going to be anything too serious. We're thinking about him and hope he's OK."

Pagan was hitting .262 with three home runs and 24 RBIs in 46 games as the team's leadoff hitter prior to the injury.

Line drive bruises Gaudin's elbow, forces exit

SAN FRANCISCO -- Giants starter Chad Gaudin suffered a bruise near his right elbow when he was struck by a line drive off the bat of the Marlins' Derek Dietrich in the fifth inning Thursday and left the game.

Gaudin picked up the ball after it hit him and threw out Dietrich. Head athletic trainer Dave Groeschner and manager Bruce Bochy came out to the mound and Gaudin threw a few practice pitches to see if he could remain in the game, but he could not.

"It hurt," said Gaudin, who added that X-rays were negative. "It hit me square in the arm and my arm immediately hurt."

He said he will know more Friday, but fully expects to make his next scheduled start Tuesday in Los Angeles.

Gaudin had pitched effectively Thursday, allowing no runs on just two hits in 4 1/3 innings in his fourth start since he was added to the starting rotation after Ryan Vogelsong broke his hand. He said being forced to leave was "more frustrating than disappointing."

"It was a little scary at first," Giants first baseman Brandon Belt said. "It was already turning black and blue [on the mound] after he got hit. It was a little more serious than we thought."

"He's done a really nice job, filling in for Vogelsong," Bochy told reporters before Thursday's game. "It's nice to have a veteran who has experience and who can help out. He's so valuable on the club because he can be a long man, help set up and also start. To have a swing man who's capable of doing that, that's not really something we've had over the last three, four years. We've been fortunate because our guys have stayed healthy and have been consistent at getting us deep in the game."

Reliever Sandy Rosario entered the game to replace Gaudin and threw 2 2/3 innings. His leadoff walk to Justin Ruggiano in the eighth ultimately scored to tie the game, which the Giants lost, 2-1.

Zito to maintain routine after father's death

SAN FRANCISCO -- Barry Zito intends to start Saturday against the Miami Marlins despite the death of his father, Joseph, in Van Nuys, Calif., on Wednesday. The elder Zito was 84.

"His routine will remain the same," said Giants manager Bruce Bochy, who discussed the matter with Zito. "There's nothing that's going to change, right now. He's scheduled to go."

Joseph Zito was influential in his son's pitching development. A composer, conductor and arranger with Nat King Cole's band in the early 1960s, Joseph Zito knew extremely little about baseball. But once Barry demonstrated passion and aptitude for the game as a young boy, Joseph did all he could to nurture his son's interest.

Joseph had a pitcher's mound installed in the backyard of the family's home. He brought Barry instructional books about pitching. Moreover, he scheduled pitching lessons for Barry with Randy Jones, the former San Diego Padres ace and 1976 National League Cy Young Award winner. Zito proceeded to win the 2002 American League Cy Young Award with Oakland.

"The loss of my father, Joseph Zito, has presented me with a difficulty I could not predict," Zito said in a statement issued by the Giants. "Through his unprecedented dedication as a father, he instilled in me the faculties which have enabled me to handle all of life's challenges in a positive way. He will forever be in my heart. God bless my father, and I know that one day I will be reunited with he and my mother Roberta."

Said Giants president and CEO Larry Baer in a statement, "The Giants organization was deeply saddened to learn of the passing of Barry's father, Joseph Zito. The special relationship that Barry and his dad shared showed so many of us in the Giants family how special the bond between a father and son can be. Our heartfelt sympathies go out to Barry, his wife Amber and his sisters, Bonnie and Sally."

Sandoval to start rehab stint a day earlier

SAN FRANCISCO -- Third baseman Pablo Sandoval's sharp performance during a Thursday afternoon workout at AT&T Park prompted the Giants to accelerate the start of his Minor League injury rehabilitation assignment by a day.

Sandoval initially was expected to begin his rehab stint Saturday. But after watching Sandoval hit and field on his sufficiently recovered left foot, Giants manager Bruce Bochy said that the two-time All-Star will report to Stockton to join Class A San Jose and fill the designated hitter's role Friday, then will play third base Saturday. Bochy indicated that Sandoval's duties Sunday will be flexible. He might play another game for San Jose, or he could rejoin the Giants for another extensive workout.

Either way, Sandoval likely will be reinstated from the 15-day disabled list Monday, when the Giants begin a three-game series against the Dodgers in Los Angeles.

Bochy responded affirmatively when asked whether Sandoval has lost weight, as he was asked to do when he was sidelined.

"I don't have a number [of pounds] for you, but he has worked hard on it," Bochy said.

Giants' first-rounder Arroyo pays visit

SAN FRANCISCO -- Giants first-round Draft pick Christian Arroyo took in his first game at AT&T Park on Thursday after signing with the organization.

Arroyo, the 25th overall pick, said he grew up a Rays fan, but that Buster Posey was one of his favorite athletes. He said he was excited to meet the Giants catcher before Thursday's game started.

Some scouts have questioned Arroyo's ability to remain at shortstop long-term, but the Spring Hill, Fla., native took extra measures during his senior season of high school ball to improve his chances.

"Going into the season, people were telling me I wasn't fast enough to play short or had enough pop to play third," Arroyo said. "The bottom line was I wanted to get to work."

That work included strength and agility training, yoga and deep tissue massages, and Arroyo said it paid off. When he reports to the Giants' rookie ball team in Arizona on Friday, it will be as a shortstop. As far as remaining at the position, Arroyo said he views Giants shortstop Brandon Crawford as motivation.

"It's nice to see a guy that big playing short," he said. "He's a big dude and he's very good, so hopefully one day I can get there and play the same position and stay there."

Arroyo, listed at 6-foot-1 and 180 pounds, equated the moment when the Giants selected him in the First-Year Player Draft with winning a gold medal on Team USA at the 18-and-under world championships last fall.

"I was watching [the Draft] in anticipation," he said. "I was anxious to hear my name, but once it happened. I broke down. I actually cried. I was very happy."

Worth noting

• The bruising in Brandon Crawford's right index and middle fingers had diminished prior to the start of Thursday's game. Manager Bruce Bochy did not put him in the starting lineup, but said he could be available in Thursday's game depending on how batting practice went. He pinch-ran in Wednesday's win after spraining the fingers Tuesday.

• The Giants announced reliever Ramon Ramirez has cleared release waivers and is a free agent. He was designated for assignment June 13 after allowing seven earned runs in 5 2/3 innings.

• Marlins right fielder Giancarlo Stanton entered Thursday night's game with 25 home runs and 50 RBIs in 50 career games in National League West ballparks. He hit two home runs and drove in all three runs in a 3-2 win at Arizona on Monday.

• The Giants recorded their 200th consecutive sellout at AT&T Park on Wednesday with an announced attendance of 41,866.

Chris Haft is a reporter for MLB.com. Andrew Owens is an associate reporter for MLB.com. Follow him on Twitter @OwensAndrew. This story was not subject to the approval of Major League Baseball or its clubs.