Backup man synonyms, backup man antonyms - FreeThesaurus.com
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Synonyms for backup man
someone who takes the place of another (as when things get dangerous or difficult)
References in periodicals archive
In case of doubt, we let the backup man take the throw.
A good back-up drill can be devised simply by having the infielders purposely let balls get by them for the sole purpose of checking to see whether the backup man was in the correct position.