He spent the 2018 season with the Helena Brewers of the Pioneer League. With them, at 19 years of age Lazar was 3–3 with a 4.37 ERA, as in 14 starts (3rd in the league) he pitched 68 innings (4th), giving up 74 hits and 15 walks, while striking out 55 batters (10th).[10]
He was promoted to the Single-AWisconsin Timber Rattlers to start off the 2019 season.[9] Lazar spent most of the season with the team, largely pitching in tandem with Reese Olson in the early part of the season, with a brief stint with the rookie level Arizona League Brewers Gold in June (in which in six innings he gave up one earned run, four hits, no walks, and had 10 strikeouts).[10][5][9] With the Timbler Rattlers he was 7–3 with one save and a 2.39 ERA over 19 appearances (10 starts), as in 79 innings he gave up 67 hits and 15 walks (1.7 walks per 9 innings; 7th in the league), while striking out 109 batters (12.4 strikeouts per 9 innings (leading the league) and 7.27 strikeouts per walk (3rd), with a 1.038 WHIP.[5][10] Lazar was named a Low–A All-Star by Baseball America following the season.[5]
Ironically, he sits just 86-89 but his deceptive, funky, over-the-top delivery combined with the extreme length of his stride down the mound (nearly seven-and-a-half feet of extension) makes him an uncomfortable at-bat for opposing hitters.... Lazar can somehow turn over a changeup from this arm slot. We’ve seen plenty of fastballs thrive despite mediocre velocity before. Often it’s from someone who has an extremely vertical arm slot ... or huge extension and a flat approach angle... Lazar has both of these attributes, and has a bat-missing changeup, too.... Even if they don’t develop further, Lazar has two legit weapons that should work fine in relief, and he throws strikes at such a high rate that he could be a multi-inning bullpen piece.[12]
Returning to action in 2022, pitching for the first time in 951 days, he started the season with the Timber Rattlers, now at the High-A level, for whom he pitched 32 innings.[5][13] Lazar was placed on the injured list on June 13. He spent the rest of the season on a rehab assignment with the ACL Brewers (one inning) and the Carolina Mudcats of the Single–A Carolina League (seven innings).[5] He split the season starting and relieving, finishing with an aggregate record among the three teams of 1–1 with one save and a 3.83 ERA in 15 appearances (9 starts).[5] After the season, Lazar played for the Brisbane Bandits of the Australian Baseball League, and was 4–3 in 10 starts with a 3.72 ERA, pitching 46 innings and giving up 38 hits and 8 walks while striking out 52 batters.[14]
Lazar returned to Wisconsin for the start of the 2023 season, now exclusively a relief pitcher. He was promoted to the Double-ABiloxi Shuckers of the Southern League on June 30.[5] Over the entire season between both levels, he finished with a 3.26 ERA across 33 outings, with three holds and three saves while striking out 73 batters (9.5 strikeouts per 9 innings) and walking 19 in 69 innings.[15] Lazar elected free agency following the season on November 6, 2023.[15]
Philadelphia Phillies
On December 8, 2023, Lazar signed a minor league contract with the Philadelphia Phillies organization.[16] He started the season with the Double-AReading Fightin Phils playing in the Northeast Division of the Eastern League, where he pitched to a 0.00 ERA while striking out 18 batters and not walking any in 10+1⁄3 innings over 8 outings. He was then promoted to the Triple-ALehigh Valley IronPigs in the International League.[15] He was named Phillies Minor League Pitcher of the Month for June, after not allowing any earned runs in 11 appearances (12+1⁄3 innings), while posting an 0.49 WHIP.[17] Lazar's fastball was 94-95 mph, and his curveball was his best pitch.[18] Before he was promoted to the major leagues, between Reading and Lehigh Valley he had a 1.79 ERA in 34 relief appearances, with 13 saves in 15 opportunities, and 53 strikeouts (11.8 strikeouts per 9 innings), 25 hits (5.6 hits per 9 innings), and 9 walks in 40+1⁄3 innings, and an 0.84 WHIP.[18][17][10] He had a 33.8% strikeout rate, and 5.8% walk rate.[19]
Major leagues
On August 9, 2024, Lazar was selected to the Phillies' 40-man roster, and promoted to the major leagues for the first time.[18][20] He made his MLB debut the next day, against the Arizona Diamondbacks. He retired the four batters he faced with a mix of curveballs, cutters, and a four-seam fastball that reached 95.5 mph, including a strikeout of Joc Pederson.[21][22]
