Tim Tebow's ex-teammate just went scorched earth on the Mets over the former QB's 2016 signing ... calling the move a "mockery" and saying it only happened to help the team sell tickets.
Andrew Church -- a 2nd-round pick by the Mets in 2013 -- just exploded on his former squad after they officially released him this week ... taking aim at Tebow's signing in the rant.
“The Mets made a mockery of our team by putting a celebrity on it to sell more tickets,’’ Church wrote. "I saw players lose their jobs because of it.