Two headed goals in open play?

[Sothall_Blade]

When was the last time before Grimsby that United scored two headed goals in a match both not from set pieces? (Not even from crosses in this case)
It must be a fairly rare occurrence I would have thought?

 

[GreasyChipBeattie]

When was the last time before Grimsby that United scored two headed goals in a match both not from set pieces? (Not even from crosses in this case)
It must be a fairly rare occurrence I would have thought?

You didn't need to add the 'headed' bit if you were referring to last season S_B!!