MLB free agency: Zac Gallen returns to D-Backs on 1-year, $22 million deal Zac Gallen's free agent market never really materialized this offseason. Content Original Link: https://sports.yahoo.com/mlb/breaking-news/article/mlb-free-agency-zac-gallen-returns-to-d-backs-on-1-year-22-million-deal-022050600.html