A local product, Arrighetti attended Cinco Ranch High School in the Houston suburb of Katy...While at Cinco Ranch, was a two-time unanimous First Team AllDistrict pitcher...Earned First Team All-State honors as a senior...Went undrafted out of high school...Began his collegiate career at TCU, making 16 appearances and fanning 19 batters in 17.0 innings pitched as a freshman...Transferred to Navarro Junior College for his sophomore year, where he made four starts and owned a 2-2 record with a 4.26 ERA...Tallied 19.0 innings pitched on the bump and recorded the most strikeouts (30) and highest K/9 (14.21) on the team...Transferred to the University of Louisiana at Lafayette, where he pitched one season (2021)...Starred as a Ragin’ Cajun, going 7-6 with a 3.12 ERA (29ER/83.2IP) in 16 games (13 starts)...Selected by the Astros in the sixth round of the 2021 draft...Signed by Astros scout Landon Townsley...As expected, Spencer is of Italian heritage and has been associated with spaghetti pasta his entire life, which is a meal he does enjoy...At Double-A Corpus Christi in 2023, his teammates produced shirts with a stick figure of Arrighetti pitching next to the text “Spaghetti of Meat Balls”...The crew wore the shirt for every start of Spencer’s...The infamous drawing was inspired after playing a Pictionary-type game with his teammates on their phones...Received his first career invitation to Major League Spring Training camp in 2024...Was signed to a Minor League contract for the 2024 season.
2023
Was named the Astros 2023 Minor League Pitcher of the Year and a MiLB.com Organizational All-Star after combining to go 9-7 with a 4.40 ERA (61ER/124.2IP) in 28 games (21 starts)...Posted 141 strikeouts in his 124.2 innings on the season...Began his season at Double A, where he made his first 13 appearances (eight starts)...Had a slow start to the season, posting an 11.05 ERA (18ER/14.2IP) in his first four appearances...Recovered to dominate in May, going 4-0 with a 0.67 ERA (2ER/27IP) in five games (three starts)...Named the Astros Minor League Pitcher of the Month for May...Racked up 79 strikeouts in his 60.2 innings before a promotion to Triple-A in late June...Finished his season at Triple-A, making 15 appearances...He was especially great at home for the Space Cowboys, pitching to a 1.93 ERA in nine appearances (eight starts), giving up just nine total runs in 42.0 frames of work...Overall on the season, Arrighetti finished second in the Astros system in wins, third in strikeouts, innings pitched, batting average against (.217) and games started (21), fourth in WHIP (1.25) and sixth in ERA.
2022
Split his 2022 season between Corpus Christi (5g/4gs) and Class A Asheville (22g/13gs)... combined to go 7-6 with a 4.73 ERA (56ER/106.2IP) on the season...led all Astros minor leaguers with 152 strikeouts in just 106.2 innings of work.
2021
Began his professional career in 2021 with the FCL Astros, making two appearances...promoted to Class A Fayetteville for his final four appearances of the season.