Via Joe McDonnell:
[The Dodgers set] a record on June 1 as five sons of major leaguers — Tony Gwynn, Scott Van Slyke, Ivan De Jesus, Dee Gordon and Jerry Hairston Jr. — were all in the starting lineup against Colorado. Gwynn was in the outfield, while the other four set a record for sons of ex-big leaguers comprising the starting infield.
Five out of nine? I want to see some team better than mark. It may never happen.