Nicolaus Tanner Mears Bio
Nicolaus Tanner Mears (born October 7, 1996) is an American professional baseball pitcher who currently plays for the Kansas City Royals of Major League Baseball (MLB). The right-handed reliever has previously appeared in the majors with the Pittsburgh Pirates, Colorado Rockies, and Milwaukee Brewers. Mears began his professional career as an undrafted free agent in 2018 and has developed into a reliable bullpen arm across his MLB tenure.
Early Life and Background
Nicolaus Tanner Mears grew up in Rocklin, California, where he attended Rocklin High School. His formative years in the Golden State provided the foundation for his baseball development before advancing to the collegiate level.
Mears continued his baseball career at Sacramento City College, suiting up for the Panthers in the competitive junior college ranks. His performance during the college baseball seasons caught the attention of professional scouts despite going undrafted in the 2018 MLB Draft.
During the summers of 2017 and 2018, Mears played summer league baseball for the Willmar Stingers of the Northwoods League. This experience against top collegiate talent helped refine his craft and prepared him for the professional level.
Path to Professional Baseball
Despite not hearing his name called during the 2018 MLB Draft, Mears continued pursuing his professional dreams. His persistence paid off when he signed with the Pittsburgh Pirates as an undrafted free agent on August 22, 2018. The signing came after a standout showing at Sacramento City College and with the Willmar Stingers.
Mears reported to professional play in 2019 and moved rapidly through the Pirates minor league system. He reached the Double-A Altoona Curve in his first full professional season, though he spent the majority of the campaign with the High-A Bradenton Marauders. Across three levels during the 2019 season, Mears threw 46 and two-thirds innings, recording 69 strikeouts while issuing only 18 walks. He maintained a 3.28 earned run average and worked exclusively out of the bullpen, establishing the relief role that would define his career.
Nicolaus Tanner Mears Career
Major League Debut and Pittsburgh Pirates (2020–2022)
Mears received his first major league call-up on August 8, 2020, joining the Pirates roster. He made his major league debut that same evening against the Detroit Tigers, pitching one inning and allowing one run. Mears appeared in four games with Pittsburgh during the pandemic-shortened season, throwing five innings and surrendering three runs overall.
The 2021 season saw Mears spend time at the alternate training site before joining the Triple-A Indianapolis Indians when their campaign began in May. He earned recalls to the major league club throughout the season, with his first official appearance coming during his fourth stint that began on July 20.
Mears faced a significant setback at the start of the 2022 season. He was placed on the 60-day injured list on March 15 after undergoing arthroscopic surgery on his right elbow. He returned to action on August 20 and was optioned to Triple-A Indianapolis for the remainder of the season. On December 18, 2022, Mears was designated for assignment following the Pirates acquisition of Connor Joe.
Colorado Rockies (2023–2024)
Following his departure from Pittsburgh, Mears was claimed off waivers by the Texas Rangers on December 23, 2022. However, his tenure with the Rangers lasted only four days before he was designated for assignment to make room for free-agent signing Nathan Eovaldi.
On January 6, 2023, Mears was claimed off waivers by the Colorado Rockies. He began the season with the Triple-A Albuquerque Isotopes before earning a spot on the major league roster. In 16 games for the Rockies during the 2023 campaign, Mears posted a 3.72 earned run average with 21 strikeouts, demonstrating his ability to contribute at the highest level.
The 2024 season saw Mears become a more prominent part of the Colorado bullpen. He made 41 appearances out of the pen, recording a 5.56 earned run average with 57 strikeouts across 45 and one-third innings pitched. The Rockies utilized him as a multi-inning reliever throughout the season.
Milwaukee Brewers (2024–2025)
On July 27, 2024, Mears was traded to the Milwaukee Brewers in exchange for Bradley Blalock and Yujanyer Herrera. He joined the Brewers bullpen mid-season and struggled initially in his new uniform, going 0-1 with a 7.30 earned run average and 18 strikeouts across 12 and one-third innings in 13 appearances down the stretch.
The 2025 season marked a significant turnaround for Mears in Milwaukee. He appeared in 63 games out of the bullpen, compiling a 5-3 record with a 3.49 earned run average. He recorded 46 strikeouts and collected his first career save across 56 and one-third innings pitched. The performance established him as a reliable late-inning option for the Brewers.
Kansas City Royals (2026–Present)
On December 14, 2025, Mears was traded to the Kansas City Royals along with Isaac Collins in exchange for Ángel Zerpa. He joined the Royals organization for the 2026 season, bringing his experience from four major league franchises to a Kansas City bullpen looking for depth pieces.
Driving Style and Strengths
Mears has established himself as a versatile bullpen arm capable of working multiple innings. His ability to induce ground balls and limit free passes has made him a valuable piece for managers seeking reliability in middle-to-late relief situations. His experience across multiple organizations has allowed him to adapt to different bullpen roles and team cultures.
Notable Events and Milestones
Throughout his career, Mears has appeared in over 100 major league games, accumulating meaningful post-trade-deadline experience with multiple franchises. His first career save recorded during the 2025 season with Milwaukee marked a milestone in his evolution as a reliever. The elbow surgery he overcame in 2022 demonstrated his resilience and commitment to continuing his professional career.
Nicolaus Tanner Mears Career Wins
Across his MLB career spanning five seasons with four different organizations, Mears has compiled a record of 9 wins and 12 losses through May 22, 2026. He has recorded 188 career strikeouts while maintaining a 4.53 earned run average across his major league appearances.
Milwaukee Brewers Highlights
His most productive season came with the Milwaukee Brewers in 2025, where he went 5-3 with a 3.49 earned run average in 63 appearances. The 63-game workload represented his highest single-season usage rate, and the save he recorded marked his first career trip to the mound in a closing situation at the major league level. His turnaround from a difficult initial stretch with Milwaukee to a dependable setup role showcased his ability to make adjustments.
Other Wins and Performances
Prior to his breakthrough with Milwaukee, Mears accumulated victories with both the Pirates and Rockies organizations. His time with Colorado in 2023 saw him post his lowest single-season earned run average at 3.72 during his 16-game stint. The combination of his early-career development with Pittsburgh and his recent success in the National League Central has built a foundation for continued contribution at the major league level.
| Team | Years | Games | Record | ERA | Strikeouts |
|---|---|---|---|---|---|
| Pittsburgh Pirates | 2020–2022 | 35 | 2-4 | 5.40 | 46 |
| Colorado Rockies | 2023–2024 | 57 | 2-4 | 5.05 | 78 |
| Milwaukee Brewers | 2024–2025 | 76 | 5-4 | 4.74 | 64 |
Nicolaus Tanner Mears Family
Family Background
Limited verified information is available regarding Mears family background and lineage. He grew up in Rocklin, California, where he attended Rocklin High School before moving on to Sacramento City College.
Personal Life
Mears maintains an active presence on social media, connecting with fans through his verified accounts on X and Instagram. He continues his baseball career with a focus on contributing to whichever organization employs his services.
2025 Season Performance
The 2025 season represented a pivotal year in Nicolaus Tanner Mears career trajectory. After being acquired by the Milwaukee Brewers in late July 2024, he spent his first full season with the organization establishing himself as a key bullpen component. His 63 appearances out of the pen marked a significant increase from previous campaigns, demonstrating the trust the coaching staff placed in his abilities.
Mears compiled a 5-3 record with a 3.49 earned run average across 56 and one-third innings pitched. The left-on-base percentage and ground-ball numbers reflected his evolution as a pitcher capable of navigating tough situations. His strikeout rate remained solid at approximately 7.4 per nine innings, and he recorded his first career major league save during the season.
The transition to a new team following the mid-2024 trade required adjustments to different coaching philosophies and clubhouse environments. Mears adapted well, finishing the season with positive momentum that carried into the offseason before his acquisition by Kansas City. The 2025 campaign solidified his standing as a viable major league reliever capable of handling high-leverage situations in various roles.