Lou Vickery was a non-roster invitee with the Cardinals in 1961 and with the Yankees in 1965.
Wally Seward was a non-roster invitee with the Indians in 1953 and 1959. He did not get an invitation to the Phillies' spring camp in 1962. Instead, he signed with Buffalo in late March of 1962 and joined them directly.
https://www.baseball-reference.com/r...d=vicker002and
https://www.baseball-reference.com/r...d=seward001wal