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6/1/2014 1:14 A.M. ET

Moss to miss time with tight right calf

OAKLAND -- Brandon Moss was held out of the A's lineup Saturday after leaving Friday's series opener against the Angels with right calf tightness.

Manager Bob Melvin said Moss will likely sit out Sunday's game as well, which would give him three days to recover including an off-day Monday.

"He's OK, still day to day," Melvin said before Saturday's game. "I don't want to get ahead of myself. We'll see how he's doing tomorrow."

After hitting his first career grand slam in the first inning Friday, Moss began to experience pain in his right calf prior to the top of the third.

"I was coming onto the field and it just balled up on me, and I couldn't really get the cramp out for the entire inning," Moss said. "It was hurting pretty badly."

Moss entered Saturday with 13 home runs and a team-leading 46 RBIs.

Kyle Blanks, who replaced Moss at first base Friday, got the start at first base Saturday against southpaw Tyler Skaggs.

Reggie recalls Oakland champs teams fondly

OAKLAND -- Prior to Saturday's on-field celebration of the A's 1974 World Series championship team, Reggie Jackson reflected on his years spent in Oakland.

Jackson played for the A's between 1967-75 and again in '87, and he won three consecutive World Series rings from 1972-74.

While Jackson also won two championships with the Yankees, he said his years with the A's make up a significant part of his legacy.

"I won three World Series here. I played eight years here, nine when I came back, something like that," he said. "I hit more home runs here than I hit [in New York]. I probably accomplished more here. ... I don't like to compare them, but if I had to say who would it be, I'd probably say the A's."

Jackson was the American League and World Series MVP in 1973, a year in which he tallied 32 home runs and 117 RBIs.

He noted that impeccable chemistry is what set the A's of the early '70s apart.

"We were so good because we played together throughout the Minor Leagues, and everybody knew where the other guy was going to be," he said. "I remember looking to my right and Sal Bando was there, look to my left it was Joe Rudi, and Catfish [Hunter] and Rollie [Fingers] and Campy [Bert Campaneris].

"When you went to war every day, when you went on the field every day, you knew you had a chance to win."

Jackson speculated that those A's could have won even more titles had the team not been broken up after '74.

"I probably think we could have won five or six if we'd have stayed together 10 years," he said. "Of course, what injuries would do -- [but] we didn't have injuries."

Jackson threw out a ceremonial first pitch Saturday night along with Gene Tenace and Fingers, the MVPs of the 1972 and '74 World Series teams, respectively.

Soon enough, Jackson said, the current A's could win a title of their own.

"They'll get a diploma here in a year or two if they stay healthy -- they'll get their doctorate and win a championship," he said. "They've got enough pitching there, and I think their front office knows what to do."

Worth noting

• Right-hander Ryan Cook (right forearm strain) threw a scoreless inning in relief for Class A Advanced Stockton on Saturday, needing just nine pitches to get through the eighth. Melvin hopes he will need no more than two appearances before returning to the big league club.

"We want to see him do well, and we want to see him throw the ball over the plate and do all the things that would suggest that you have some confidence coming back to the team," Melvin said. "But it could be as quick as one [appearance], it could be a couple."

• Melvin decided to leave leadoff man Coco Crisp out of his starting lineup Saturday.

"It's a day off, but I have to be careful with him," Melvin said. "He's been playing with some nagging stuff, but he's not [out] because of an injury. It's a combination of things, but more just trying to be proactive with him and was going to give him this day off regardless."

The manager said Crisp would potentially be available in a late-game situation.

Aaron Leibowitz is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.