Kaminer recorded 79 innings pitched over 23 appearances and 11 starts in 2025 for the Bird Dawgs. The southpaw started the season as a reliever before making the transition to a starter in mid-June, as he posted a 3-4 record with a 2.51 ERA as he struck out 72 batters. At the Frontier League All-Star break, he held a 1.28 ERA over 42 innings pitched with a 0.88 WHIP. He recorded the win in the All-Star game before becoming a mainstay in the Bird Dawgs starting rotation to finish out the year. 

Kaminer started his pro career in the Pioneer League with the Northern Colorado Owlz, where he spent the 2023 and 2024 seasons. In 2023, he was mainly a starter, appearing in 15 games while starting nine. He returned to Northern Colorado in 2024 but this time as a reliever, as he made 23 appearances while starting just one. 

Kaminer came out of Marjory Stoneman Douglas High School as an All-American by Louisville Slugger after posting a 1.16 career ERA with 190 strikeouts, which led him to commit to the Division I University of Miami. However, before his freshman season began, he transferred to Florida Southwestern State, making eight appearances with a 6.00 ERA. The southpaw then spent his sophomore year at Wallace Community College-Dothan, where he posted a 5.12 ERA in 65 innings, allowing just nine walks all year with 68 strikeouts. Kaminer’s command of the strike zone allowed him to transfer to Division I Louisiana State University, where he spent the 2020 and 2021 seasons. In 2020, Kaminer appeared in seven games, while posting a 2.84 ERA in 12.2 innings with five walks and 12 strikeouts. In 2021, he appeared in seven games as a reliever, posting no decisions. Kaminer transferred to Division I Georgia State for the 2022 season as a graduate student. While at GSU, Kaminer was a weekend starting pitcher as he went 1-1 with a 3.74 ERA in 12 appearances, collecting 42 strikeouts in 43.1 innings.