#4 Humberto Carrillo could challenge Sheamus
Humberto Carrillo has been a thorn in Sheamus' path lately. He has taken the fight to The Celtic Warrior, and has not been afraid to stand up to his brash attitude.
Carrillo was in contention for the US Championship, but a scary botch in an encounter with Sheamus resulted in an injury.
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If the Mexican-born high-flyer had not fallen with injury, he would've taken Ricochet's spot as the contender for the US Championship, perhaps even securing a title opportunity at WrestleMania Backlash.
However, the injury didn't keep him out of sight for long as he returned within a month. The cruiserweight returned to action on the latest edition of RAW for a showdown against the Celtic Warrior.
The US Champion was victorious by rolling Carrillo up while holding his tights. Sheamus wanted to beat him down after the match ended, but Ricochet made the save.
WWE may choose to do a Triple Threat between the three rivals, but Carrillo could end up challenging Sheamus in a one-on-one match as well.
Humberto Carrillo has a decent chance of winning the US Championship. He hasn't won a singles championship on the main roster, and that may change if he faces Sheamus at Hell in a Cell.