What are instances of team-sport players having to play out of their normal position, due to injury, rules, or whatever?
In baseball, position players being forced to pitch is relatively common; for example, in 2012 the Orioles’ Chris Davis, normally a 1st baseman, was put in to pitch 2 innings because all the other active pitchers had been subbed out already (a game in which he pitched against another position player, Darnell McDonald of the Red Sox).
Also in 2012, Maryland lost all of their scholarship QBs to injury (almost all ACLs, IIRC), and had to start one of their linebackers at QB (result was not good).
There was an OHL game where a forward was forced to play goalie, who gave up 13 goals (but to his credit, he did make 32 saves).
Any other examples of this sort of thing that stand out?