Carbone reported that he is only certain about three of Gabby's Final 4 suitors: Johnny DePhillipo, a 25-year-old from Palm Beach Gardens, FL; Jason Alabaster, a 30-year-old from Santa Monica, CA; and Eric Schwer, a 29-year-old from Santa Monica, CA.
In a May 12 blog post, Carbone revealed that he received "confirmation" that both Tyler Norris from Rachel's group of men and Johnny DePhillipo from Gabby's group of men were already back home.
With past seasons of The Bachelor and The Bachelorette, the Final 3 person stayed in the final filming location until the show wraps.
Given Gabby and Rachel's season was still filming at the time, Tyler and Johnny's return home would appear to indicate they were eliminated from the Season 19 competition at the Final 4 Rose Ceremony, which typically films in Los Angeles, CA.
Carbone had received "circumstantial evidence" earlier this month that pointed to Justin Budfuloski, a 32-year-old from Solana Beach, CA, being Gabby's mystery fourth bachelor.
Carbone said it was possible Gabby had filmed a hometown date with Justin in Simi Valley, CA.
"I just have never been specifically told or seen any pics/videos she did," Carbone said at the time.
However, Justin's sister-in-law posted a photo of Justin with his family on Mother's Day via her Instagram account.
The format of The Bachelorette's upcoming season has yet to be officially announced by ABC, and when Gabby and Rachel were announced as the two leading ladies in March, they didn't even know how the process was going to work.
"Everyone keeps asking," Gabby said on Good Morning America.
"We just got thrown in. But I have faith and a lot of trust and I love Rachel to death and I know we're gonna have each other's backs the whole way, so there's really not a doubt in my mind that it's gonna end up well."
The Bachelorette's new season will be hosted by Jesse Palmer and premiere Monday, July 11 at 8PM ET/PT on ABC.
Viewers watched The Bachelor star Clayton Echard break up with and devastate Gabby and Rachel in a group dumping session after sleeping with the both of them and also professing his love to three women.
Clayton let Gabby and Rachel go in order to chase down the woman he was "the most in love with," Susie Evans, who had quit during Fantasy Suites due to Clayton's decision to be intimate -- both emotionally and physically -- with two other ladies.
Gabby and Rachel were sent packing when they were both totally in love with Clayton and had met his family.
Clayton made each girl feel like she was going to be the one at the end with him, but he is now dating Susie in the real world.
On The Bachelor: After the Final Rose special, Gabby said she felt misled by Clayton and complained, "As you said, you compartmentalized our relationships. Watching it back, everything is so muddled and you were clearly pitting us against each other. It really seemed like a competition, which I had expressed to you I didn't want to be a part of."
"And it seemed like you had your mind set on Susie WAY before you wanted to tell us, and you kept going back to Rachel and I, 'Oh, I want to try this and I want you to meet my family -- but I can't stop thinking about Susie and I love Susie the most,'" she added.
Rachel also admitted to feeling betrayed and "cast aside" by The Bachelor 26 star. Rachel put Clayton in his place by saying he never loved her and ultimately didn't deserve her love.
Rachel even questioned Clayton if he had just said "I love you" to her in order to sleep with her in the Fantasy Suites.