August 22 : The Giants have now made this official, selecting Harrison and reinstating righty from the paternity list. To open active roster spots, right-hander and outfielder were optioned. To open a 40-man spot for Harrison, infielder was transferred to the 60-day injured list. Mathias was placed on the injured list a week ago due to a right shoulder strain. Hell now be ineligible to return until 60 days from August 14, which rules him out until the middle of October. Barring a lengthy postseason run by the Giants, it seems his season is over. August 20, 3:58 pm: Giants manager confirmed to reporters, including , that Harrison was poised to be promoted. Hell start the Giants game against the Phillies in Philadelphia on Tuesday. 10:14 am Jake Mcgee Jersey : The Giants are calling up top pitching prospect , FanSideds Robert Murray reports ( ). Earlier today, wrote that San Francisco was strongly considering promoting Harrison during an upcoming series with the Phillies, and Murray says that Harrison is being aimed to start Tuesdays game. San Francisco will need to make another transaction before then to create a 40-man roster spot for the left-hander. The promotion makes for a nice late birthday gift for Harrison, who turned 22 on August 12. It is quite po sible that the southpaw would have already made his MLB debut if it wasnt for a hamstring strain that put him on the injured list for almost all of July, but after pitching in three Triple-A games since his return from the minor league IL, Harrison has been deemed ready for his first taste of the Show. It doesnt seem as though Harrison will be taking on a full-fledged starter role, as Baggarly notes that Harrison might work in more of a piggyback capacity on Tuesday, perhaps not throwing more than 3-4 innings. Harrison has had a limited workload for much of the minor league season, as he has topped the 80-pitch threshold only three times and has only once thrown as many as five innings in a single outing. With this in mind, Harrison looks to become the latest member of a patchwork Giants rotation that has recently featured only two regular starters. Beyond and , a group led by , , , and have made limited starts, piggyback outings, or have worked as bulk pitchers behind an opener. This collection took a hit yesterday when Stripling was placed on the 15-day IL due to a back strain, and was recalled from Triple-A to work as a long reliever or bulk pitcher. Its not an ideal situation for a team fighting for a wild card berth, so there will be a bit of a bigger spotlight than usual on Harrison as he becomes a big leaguer. However, Harrison has dealt with plenty of hype as his prospect stock has risen over the last few years, since being selected by the Giants in the third round of the 2020 draft. In recent midseason updates to their prospect rankings, MLB Pipeline listed Harrison as the 20th-best prospect in the sport, while Baseball America slotted him 35th on their latest listing. Theres no secret about Harrisons biggest weak point, as he has a hefty 16.3% walk rate over 67 2/3 innings with Triple-A Sacramento this year. This shaky control (and pitching in the hitter-friendly Pacific Coast League) has contributed to Harrisons 4.52 ERA, though he also has a tremendous 35.6% strikeout rate. Both Pipeline and BA give Harrison a 70-grade for his fastball and a 60-grade for his slider, and he also has a good changeup that is still improving. Two plus pitches and the po sibility of a third has created plenty of buzz about Harrison as a po sible front-of-the-rotation starter, though the big question is naturally whether or not Harrison can improve his control and command. As Pipelines scouting report puts it, Harrison is still learning to harne s his enhanced stuff, though his ability to mi s bats in the strike zone with all three of his offerings means that he doesnt need to locate them with precision. However the Giants opt to manage Harrisons workload among the rest of the pitchers, it seems likely that the club will limit him to le s than 50 innings in the regular season, so he can retain his rookie eligibility for 2024. As per the rules of the Prospect Promotion Incentive, the Giants can receive a bonus pick in the 2025 draft if Harrison earns a full year of MLB service time in 2024, and he either wins the NL Rookie of the Year award or has a top-three finish in NL Cy Young voting during any of his pre-arbitration seasons. Harrison must be ranked as a top-100 prospect by at least two of MLB Pipeline, Baseball America, or ESPN.com in their pre-2024 lists to fully qualify as a PPI-eligible player, thought that seems like a foregone conclusion. Beyond the 50-inning threshold, pitchers also have to have le s than 46 days on a Major League roster to retain rookie eligibility. That date on the 2023 league calendar pa sed last week, so it isnt surprising that Harrison and other notable prospects like the Reds , the Cardinals , and the Angels have all been called up within the last few days alone. Photo courtesy of USA Today Sports Images Michael Rucker Jersey