In just over 12 months since Chris Bassitt was sent to the New York Mets, signaling the start of a major organizational overhaul, the A’s have acquired 27 players in 10 different trades.

Throw in about a dozen more free agents (mostly on minor league deals) and it’s no wonder most fans don’t see a lot of recognizable names when they scan the A’s spring training roster. Only 13 of the 68 players in camp were on Oakland’s 2021 spring roster. The A’s are still trying to figure out just what pieces they have and how they go together heading into the 2023 season, too.

Some of those questions will begin to be answered Saturday, when the A’s open Cactus League play against the Arizona Diamondbacks in Mesa, Arizona.

The A’s have attempted to address all their positions with the trades of stars such as Bassitt, Matt Olson, Matt Chapman, Frankie Montas, Sean Manaea and Sean Murphy, but nearly half of the players they’ve received in return were pitchers. Two of their significant offseason additions were adding hard-throwing right-hander Shintaro Fujinami from Japan and bringing Drew Rucinski back stateside after he pitched four seasons in South Korea.

Not surprisingly, two recent additions to the franchise will be the first pitchers the A’s use this spring.

Left-hander JP Sears, who appeared in 10 games with the A’s after coming over from the Yankees last August as part of the Montas and Lou Trevino deal, is scheduled to start. He’ll be followed by hard-throwing righty Freddy Tarnok, who was acquired this winter from the Braves in the Murphy trade.

Adam Oller and Kyle Muller are scheduled to pitch Sunday. Fujinami is on track to make his highly anticipated debut Tuesday against the Angels and his former high school rival, Shohei Ohtani.

It’s a crowded group vying for spots in the rotation and bullpen. Bay Area native Paul Blackburn, who went from being removed from the A’s 40-man roster to their All-Star representative last season, is the veteran of the group. He’s coming off a breakthrough season that saw him go 7-6 with a 4.28 ERA in 21 starts, but he didn’t pitch after Aug. 4 because of a finger injury. All signs so far in camp suggest the 29-year-old right-hander has recovered and is ready to resume his role as staff ace.

The A’s have five weeks of games before Opening Day on March 30 at the Coliseum against the Angels, but the rotation figures to be in flux for at least another season. Last season 12 different pitchers started games for the A’s and it wouldn’t be a surprise if they challenge that total again in 2023.

“We’re going to see some competition in the spring and then I think as the season goes along, we’re going to see guys competing for spots, and I think that’s healthy,” A’s general manager David Forst told reporters recently.