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Dodgers Add Lefty Prospect Ronan Kopp to 40-Man Roster Before Rule 5 Deadline

The move protects the 23-year-old strikeout arm from selection in December's draft.

Overview

  • Kopp effectively fills the spot opened when Robinson Ortiz, added earlier, was traded to the Mariners for pitching prospect Tyler Gough, leaving the Dodgers at 39 of 40 roster spots.
  • In 2025, Kopp recorded a 3.43 ERA across 57 2/3 innings between Double-A Tulsa and Triple-A Oklahoma City with 91 strikeouts.
  • Across five minor-league seasons in the Dodgers’ system, he has averaged 14.3 strikeouts per nine innings.
  • Kopp is a 2021 12th-round draft pick by Los Angeles and is viewed as a relief option with premium swing-and-miss stuff.
  • Last year’s late 40-man addition Jack Dreyer made the club out of spring training and pitched in 67 games, illustrating how late protections can quickly yield big-league help.