Spencer Zane Arrighetti (born January 2, 2001 in Albuquerque, NM) is an American professional baseball pitcher in the Houston Astros organization. As per Genea.net, the surname Arrighetti is linked to northern Italy in the Firenze/Pisa areas.

Arrighetti attended Cinco Ranch High School in Katy, Texas, and played college baseball at Navarro College, Texas Christian University (TCU) and the University of Louisiana at Lafayette. He was drafted by the Houston Astros in the sixth round of the 2021 Major League Baseball draft.

Spencer made his professional debut with the Florida Complex League Astros before being promoted to the Fayetteville Woodpeckers. He started 2022 with the Asheville Tourists before his promotion to the Corpus Christi Hooks.

In May 2023, he struck out 37 and allowed two earned runs across 27 May innings. The Astros named him their Minor League Pitcher of the Month as a result. Opponents slashed .166/.253/.274 against him in nine starts since May 2. Arrighetti has a 1.96 ERA, 16 walks and is throwing 65 percent of his pitches for strikes during that stretch - earning him a promotion to the Triple A Sugarland Space Cowboys.

Given his exemplary performance in the minors and as an acknowledged top prospect, Spencer was promoted to the Astro's major league roster on 4/10/24.

(excerpted from Baseball Almanac & Wikipedia)