"Big Brother" Season 27 contestants better grab a life vest, because star Rachel Reilly is checking in as the 17th houseguest

Men over the age of 50 in Big Brother are often a crapshoot. It can be hard for them to warm up to a house full of people decades younger than them, but for every Kenney Kelley and Steve Arienta that went home pre-jury, there's a Cliff Hogg and Jerry MacDonald who had a deep run even if they didn't stand a great chance at winning.

Rachel Reilly is back in the Big Brother house, and fans are either cheering or ready to change the channel. The Season 13 champ made a surprise entrance on the July 10 premiere of Big Brother 27 as the long-rumored “mystery houseguest,” after CBS teased her return with a week of cryptic clues.