After playing Steve Rodgers/Captain America across five different movies, it's hard to imagine anyone else other than Chris Evans brandishing that adamantium shield. 

However, it could very well have been another Hollywood leading man who embodied the iconic role. One Mr. John Krasinksi. 

That's right. Jim from the US Office was almost Captain America. 

Krasinski opened up to Conan O'Brien about the audition process and the exact moment he knew that he wasn't going to be Captain America. 

Stupid, ridiculously ripped Chris Hemsworth.