Cincinnati Reds The
Cincinnati Reds selected Siani in the fourth round of the
2018 Major League Baseball draft. He signed with the team and received a $2 million
signing bonus. After signing, the Reds assigned Siani to the
Greeneville Reds of the
Low-A Appalachian League, where he slashed .288/.351/ .386 with two home runs and 13 RBIs in 46 games played. He spent the 2019 season with the
Dayton Dragons of the
Single-A Midwest League and hit .253 with six home runs, 39 RBIs and 45 stolen bases. Siani returned to Dayton, now a
High-A team, in 2021 and batted .216. He was assigned to the
Double-A Chattanooga Lookouts at the start of the 2022 season. Siani batted .252 with 12 home runs, 19 doubles, seven triples, 49 RBIs and 49 stolen bases in 121 games before receiving a late-season promotion to the
Triple-A Louisville Bats. The Reds selected Siani's contract on September 22, 2022, and promoted him to the active roster. He made his major league debut later that day, starting in center field and batting 0–for–3 in a 5–1 loss against the
Milwaukee Brewers. Siani was optioned to Triple-A Louisville to begin the 2023 season. He hit .228 in 108 games for Louisville, and was hitless in three games for the Reds prior to being
designated for assignment on August 31.
St. Louis Cardinals On September 2, 2023, Siani was claimed off waivers by the
St. Louis Cardinals. He made five appearances for the Cardinals down the stretch, going 0-for-5 with a stolen base. Siani made 124 appearances for the Cardinals during the 2024 season, batting .228/.285/.285 with two home runs, 20 RBI, and 20 stolen bases. He played in 19 games for St. Louis in 2025, going 4-for-17 (.235) with two walks.
Los Angeles Dodgers On November 6, 2025, Siani was claimed off waivers by the
Atlanta Braves who then
designated him for assignment following the signing of
Mike Yastrzemski on December 10. On December 12, Siani was claimed off waivers by the
Los Angeles Dodgers, who designated him themselves following the signing of
Kyle Tucker on January 21, 2026. Two days later, he was claimed off waivers by the
New York Yankees who also designated him for assignment on January 28, following the acquisition of
Angel Chivilli. On February 3, he returned to the Dodgers via another waiver claim. Siani was optioned to the Triple-A
Oklahoma City Comets to begin the regular season. ==Personal life==