Roch Cholowsky, the No. 1 pick in the MLB draft on Saturday, didn’t waste any time squaring away his contract with the Chicago White Sox. The two sides have reportedly agreed on a record-setting signing bonus.The UCLA shortstop landed a $10.35 million bonus, according to MLB.com, about $1 million less than the slot value for the pick, but $1.1 million more than the previous record. Cincinnati Reds pitcher Chase Burns and Colorado Rockies outfielder Charlie Condon, the second and third picks in the 2024 draft, respectively, each signed for a then-record $9.25 million.Cholowsky was the White Sox’s first No. 1 pick since 1977, when they selected Hall of Fame right fielder Harold Baines. On Sunday afternoon at Rate Field, Cholowsky tossed a ceremonial first pitch to Baines.Cholowsky visited Chicago in early June and met White Sox coaches, players, front office staff and owner Jerry Reinsdorf. He was on hand when Braden Montgomery hit a walk-off home run in his major-league debut. He said he called his agent the following morning and told him, “That’s where I want to be.”The 21-year-old could be there before long. The Athletic’s draft expert Keith Law suggested Cholowsky “should move quickly through the low minors.” Cholowsky posted a .320/.452/.636 slash line during his junior year at UCLA, with 21 home runs in 60 games. Law, who ranked Cholowsky No. 1 on his pre-draft big board, described him as “a polished shortstop with power and excellent instincts on both sides of the ball” and wrote: “Barring injury, I don’t see a world where he’s not at least an everyday MLB shortstop who hits 15-20 homers — his ceiling is 25-30 homers with a high OBP — and he’ll play plus defense in any scenario.”There were, however, mild concerns about Cholowsky’s performance dipping during his junior year after a sophomore season in which he logged an 1.190 OPS. White Sox GM Chris Getz acknowledged as much and said the organization was comfortable with what they analyzed “under the hood.”Cholowsky’s father, Dan, was also a first-round pick, selected No. 39 by the St. Louis Cardinals in 1991. A versatile defender, Dan played every position on the diamond during eight minor-league seasons with the Cardinals, Chicago Cubs and Rockies. He now works as an area scout for the Reds.The day before the draft, the White Sox swung a trade for the No. 34 pick, which boosted their bonus pool to a record sum of nearly $20.5 million. They used that pick to select high school shortstop Landon Thome, the son of Hall of Famer Jim Thome, who serves as a special assistant to Getz. The Thomes also linked up for a ceremonial first pitch Sunday.Teams have until 5 p.m. ET on July 27 to come to terms with their draftees.“At the end of the day, we were most comfortable with Roch Cholowsky with our first pick,” Getz said, “regardless of what the signing bonus was going to be.”