Union second-year defender Josh Yaro underwent shoulder surgery earlier this week, and his recovery time is expected to be between three and four months, the team said.
The surgery was to repair a cartilage tear. He suffered the injury during the team's preseason in Clearwater.
"Josh came into preseason very fit and sharp. This setback is tough, but the right thing to do was to be proactive and surgery to repair the shoulder is what's best for Josh long-term," Union coach Jim Curtin said in a statement. "We know he will come back stronger than ever. We have a very deep roster that we believe in, and we know the next man will step up in Josh's absence.