Phillies President Issues Warning to Trea Turner on Defensive Improvement

• Phillies president Dave Dombrowski warns Trea Turner about his poor performance in the previous season.
• Dombrowski states it is mandatory for Turner to improve his defense if he wants to stay at shortstop.
• The Phillies plan to retain Turner at shortstop and have hired a former Mets manager as infield coach.
• Trea Turner's contract is valued at $300 million.
• The team's decision to keep Turner at shortstop is contingent on his defensive improvements.