The teammate is out simultaneously (2,3,4,4)
I believe the answer is:
at the same time
'simultaneously' is the definition.
(synonyms)
'the teammate is out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'the'+'teammate'+'is'='theteammateis'
'theteammateis' anagrammed gives 'AT THE SAME TIME'.
(Other definitions for at the same time that I've seen before include "on the other hand" , "Simultaneously - nevertheless" , "27 [AT ONE FELL SWOOP]" , "together" , "synchronised" .)