I don't know how common this is, but I heard a story about Clark Griffith and Joe Cronin. Griffith, I believe, had a former teammate, Joe Engel, that became a scout for the Senators. Engel went to see Joe Cronin play and reported back to Griffith about picking up his contract for $7500. Griffith shot back by saying "You paid $7500 for that bum?" and told Engel to keep Cronin for himself.
Cronin wound up marrying Griffith's niece. Imagine the awkward family get togethers