Otto Kemp Bio
Otto Severson Kemp is an American professional baseball infielder who plays for the Philadelphia Phillies of Major League Baseball (MLB). He joined the Phillies as an undrafted free agent in 2022 and made his major league debut in 2025, quickly earning notice as one of the rare undrafted position players to reach the majors in recent Phillies history. A graduate of Troy High School and Point Loma Nazarene University, Kemp has built his reputation through steady offensive production at every level of the minor leagues before earning a promotion to the big leagues.
Early Life and Background
Otto Severson Kemp was born on September 9, 1999, and grew up in Fullerton, California, where he attended Troy High School. He came from an athletic and supportive household, the son of Rob and Diane Kemp, and he has three siblings, including an older sister who works as a life coach. His older brother, Sam, also attended Troy High School and played baseball there, helping create a competitive home environment that encouraged Otto’s early development in the sport.
At Troy, Kemp worked his way into the varsity lineup and emerged as one of the program’s most reliable hitters, drawing attention from college scouts around Southern California. The combination of his baseball upbringing and his brother’s presence on the same high school team helped him sharpen his approach at the plate and laid the groundwork for his transition to college ball. His performance in high school earned him the opportunity to continue his career at Point Loma Nazarene University, an NCAA Division II program with a strong reputation for developing position players.
Path to Baseball
At Point Loma Nazarene University, Kemp established himself as one of the most productive hitters in the program, posting strong offensive numbers across multiple seasons and earning recognition within the Pacific West Conference. During the summer of 2021, he joined the St. Cloud Rox of the Northwoods League, a respected collegiate summer league, where he set a then-league record with 58 runs scored in a single season. He was also named to the 2021 Northwoods League All-Star Game and helped lead the Rox to the league championship game, performances that boosted his profile heading into his senior year.
Despite his college production, Kemp went unselected in the MLB Draft following the 2022 season, but he quickly signed with the Philadelphia Phillies as an undrafted free agent. The Phillies saw in him the same offensive consistency he had displayed at Point Loma and in the Northwoods League, and they placed him in their developmental pipeline. From that point, Kemp focused on refining his defensive versatility and adjusting to professional pitching as he began climbing the minor league ladder.
Otto Kemp Career
Early Career (2022-2023)
Kemp opened his professional career in 2022 with the rookie-level Florida Complex League Phillies and the Single-A Clearwater Threshers, where he worked to translate his college swing to wood bats and pro-level velocity. He showed early glimpses of his offensive potential, driving balls to all fields and showing the patience that had defined his college profile. The Phillies organization kept him on a steady development path, prioritizing at-bats and defensive reps over a rapid promotion.
In 2023, Kemp split the year between Clearwater and the High-A Jersey Shore BlueClaws, continuing to produce at the plate while adjusting to the speed of the game at higher levels. He handled multiple infield positions during this stretch, which helped the organization view him as a utility option moving forward. By the end of 2023, Kemp had cemented himself as a reliable middle-of-the-order bat in the lower minors and was positioned for a jump to Double-A in 2024.
Minor League Breakthrough (2024)
Kemp’s 2024 season marked his most demanding year in the minors, as he moved between Clearwater, Jersey Shore, the Double-A Reading Fightin Phils, and the Triple-A Lehigh Valley IronPigs. The frequent promotions reflected his continued offensive output and the Phillies’ growing confidence in his bat. After the regular season, he joined the Glendale Desert Dogs of the Arizona Fall League, a traditional finishing ground for top prospects, where he faced many of the game’s most advanced minor league arms.
Returning to Lehigh Valley to begin 2025, Kemp opened the year on a tear, slashing .330/.421/.711 in April and earning International League Player of the Month honors. His performance at Triple-A made it clear that he was ready for a major league opportunity, and the Phillies soon had a decision to make about when to give him that chance.
Philadelphia Phillies Era (2025-Present)
On June 7, 2025, Kemp was added to the Phillies’ 40-man roster and promoted to the majors for the first time, stepping in at third base to replace an injured Bryce Harper. He became the first undrafted position player to debut with the Phillies since Jeff Grotewold in 1992, underscoring the rarity of his path to the big leagues. Two days later, on June 9, he notched his first career hit, a single into left field off Chicago Cubs pitcher Matthew Boyd, and added three hits in a 4-3 extra-innings win over the Cubs in the same game.
Kemp’s first career home run came on June 27, a three-run shot off Atlanta Braves starter Bryce Elder, further announcing his arrival at the major league level. He went on to make 62 appearances for Philadelphia during his rookie season, batting .234 with eight home runs, 28 RBI, and two stolen bases. After the season, it was announced on October 17 that he would require surgeries to repair a fractured left kneecap and address damage in his left shoulder, ending his first MLB campaign on a difficult but promising note.
Notable Events and Milestones
Among Kemp’s most notable moments are his record-setting 58 runs scored in the 2021 Northwoods League season, his April 2025 International League Player of the Month award at Triple-A Lehigh Valley, and his June 2025 promotion that made him the Phillies’ first undrafted position player debut since 1992. His first MLB hit, first multi-hit game, and first career home run all arrived within his first three weeks in the majors, marking a fast start to his big league career.
Otto Kemp Career Wins
Otto Kemp’s competitive résumé is built on hitting consistency, summer league accolades, and minor league recognition rather than major league wins, which are not a tracked statistic for position players. His career highlights include the 2021 Northwoods League All-Star selection with the St. Cloud Rox, the Rox’s run to the league championship game, and his April 2025 International League Player of the Month honor at Lehigh Valley.
Northwoods League Highlights
During the summer of 2021, Kemp starred for the St. Cloud Rox of the Northwoods League, setting a then-league record with 58 runs scored in a single season. He was selected to the 2021 Northwoods League All-Star Game and helped the Rox reach the league championship game, performances that strengthened his case as a legitimate professional prospect.
Otto Kemp Family
Family Background and Racing Lineage
Kemp comes from a tight-knit family rooted in Fullerton, California. His parents, Rob and Diane, raised him alongside three siblings, including an older sister who works as a life coach. His older brother, Sam, played baseball at Troy High School, creating a shared athletic bond between the two brothers and reinforcing baseball’s central place in the household.
Personal Life
Otto Kemp is married to his wife, Lily Kemp. The couple has been part of his support system throughout his professional climb from undrafted free agent to major league infielder. His family connections have remained an important backdrop to his baseball journey, particularly as he recovered from the knee and shoulder surgeries announced at the end of his rookie season.
2025 Season Performance
Kemp’s 2025 campaign was split between Lehigh Valley and Philadelphia, beginning with a dominant April at Triple-A that earned him International League Player of the Month honors. His promotion on June 7 filled a major league opening created by an injury to Bryce Harper, and he seized the opportunity with a first week that included his first hit, first multi-hit game, and first home run. Across 62 major league appearances, he batted .234 with eight home runs and 28 RBI, providing steady production as a versatile infielder.
The Phillies used Kemp primarily at third base and as a utility option across the infield, leaning on his offensive approach and contact skills while he continued to refine his defensive footing. His season was cut short on October 17 when it was announced that he would require surgeries to repair a fractured kneecap and address damage in his left shoulder, sidelining him for the remainder of the year and into the early part of the next season. Despite the late injuries, his rookie year cemented his place in the organization’s plans.
