On Saturday, the A's acquired Ben Zobrist and Yunel Escobar from Tampa Bay in exchange for catcher John Jaso, minor league shortstop Daniel Robertson, minor league outfielder Boog Powell and cash considerations.
Giants assistant GM Bobby Evans recently said the team was "staying engaged" with the Rays regarding a deal for Zobrist, but ultimately, Billy Beane and the A's struck an agreement.
"Well, I think the A's probably have a few more liberties in their minor league system than the Giants do," Duane Kuiper told KNBR-680 AM Tuesday morning. "If you want Ben Zobrist, that's fine, but you're gonna have to give up Andrew Susac, or Joe Panik, or maybe a couple of those guys that are your prized possessions. And the Giants just aren't gonna do that.
"So, look, I was disappointed. I looked every day for a Zobrist report to see if the Giants were close, but I don't want to see those young guys go ... so you're really in a tough spot."
Zobrist hit .272 with 10 home runs and 52 RBI last season. He played all over the field -- starting 74 games at second base, 17 in left field, 16 in right field, seven in center field and 23 at short stop.
Panik became the Giants' everyday second baseman on June 22 and hit .306 with a .342 OBP through the end of the regular season.
The 24-year old finished sixth in the NL Rookie of the Year voting.
He started all 17 of San Francisco's playoff games, hitting .233 with one home run and eight RBI.
The 2011 first round pick also started a sensational double play in Game 7 of the World Series, that is arguably one of the greatest defensive plays in franchise history.
Susac appeared in 35 games for the Giants in 2014, hitting .273 with three home runs and 19 RBI.
The 2011 second round pick went 1-for-4 in the postseason.