Selected in the 5th round of the 2018 MLB Draft by the Philadelphia Phillies out of Notre Dame.. was a 2015 graduate of Christian Brothers College High School (MO)… signed by Phillies scout Justin Morgenstern... made his Major League debut on June 19, 2021 with Philadelphia... Detroit Tigers traded LHP Gregory Soto and 2B Kody Clemens to Philadelphia Phillies for Vierling, UTIL Nick Maton and C Donny Sands on Jan. 7, 2023... his brother, Mark Vierling, played at Missouri (2018-21) and Saint Louis University (2022) as an infielder while also appearing in 29 games with State College in the MLB Draft League in 2021.
2022
Despite serving as the Phillies' starting center fielder for a stretch, he was relegated to platoon appearances against left-handed pitchers following the Trade Deadline acquisition of outfielder Brandon Marsh... hit .271 with 2 homers and 9 RBIs in 21 games with Triple-A Lehigh Valley... appeared in 117 Major League games with the Phillies, batting .246 with 6 homers and 32 RBIs over 325 at-bats
2021
Was a non-roster invitee to ML spring training...Began the season with Reading (AA), reaching base safely in 23 of his 24 games...Was promoted to Lehigh Valley (AAA) on 6/15...Named Phillies Minor League Hitter of the Month for June and Phillies Minor League Defender of the Month for August...Selected as an Organization All-Star by MiLB.com...Had three stints with the Phillies: 6/19-25, 7/16 and 8/31-end of season...Made his ML debut and singled in his first career at-bat, 6/19 at SF; also recorded his first career steal and scored his first career run...Made his first career start (CF) on 6/20 at SF ...Had a career-high four hits on 8/31 at WSH; also collected his first career XBH (double) and made his first ML start at 1st base...Slugged his first career HR on 9/25 vs PIT (Wil Crowe)...Hit his first career pinch HR on 10/1 at MIA (Preston Guilmet)...Batted .362 (17-47) with two doubles, one triple, one HR, five RBI and a .903 OPS in his 15 starts; had the highest AVG (min. 40 PA) by a Phillies rookie in his first 15 career starts since Darin Ruf (.388), 9/25/12-7/13/13...Hit .250 (3-12) with one HR, one RBI and two walks (IBB) as a pinch-hitter...Following the season, was named the No. 8 prospect in the Phillies system by Baseball America.
2020
Batted .429 (3-7) with two RBI and three walks in seven spring training games with the Phillies...Participated in Florida Instructional League.
2019
Spent the entire season with Clearwater (A)…Named a Florida State League midseason All-Star and started the ASG in LF...Was T-9th in the FSL in SB (22)…Slashed .310/.389/.488 in 22 April games.
2018
Posted a .321/.365/.496 slash line in 62 combined games between Williamsport (A) and Lakewood (A) in his first professional season...Began the season at Williamsport and hit safely in 11 of his 12 games there, including seven multi-hit efforts...Promoted to Lakewood on 7/2 for the rest of the season...Overall, batted .397 (29-73) against LHP...Defensively, played games in LF (22), CF (11) and RF (17)…Appeared in all six of Lakewood’s postseason games...Participated in FIL.