At the Junior Grand Prix Final, the Hubbells placed second in the Midnight Blues compulsory dance by a margin of 0.17 points behind Bobrova/Soloviev.

[19] They won both the original and free dances to win the gold medal overall by a margin of victory of 2.17 points ahead of silver medalists and training mates Emily Samuelson / Evan Bates.

[24] At the 2007 Junior Worlds, the Hubbells both fell in the Silver Samba compulsory dance[25] and placed twelfth in that segment of the competition.

[27] The Hubbells withdrew from their 2007–08 Junior Grand Prix events and missed the fall season due to an injury to Keiffer.

[32] They placed second in the free skate[33] and won the silver medal overall, scoring 6.47 points less than champions Madison Chock and Greg Zuerlein.

[39] Following the 2009 Trophée Éric Bompard competition, the Hubbells moved from Yaroslava Nechaeva and Yuri Chesnichenko, who had coached them in Ann Arbor, Michigan for ten years, to Pasquale Camerlengo and Anjelika Krylova in Detroit.

[41] The two decided to train at the Detroit Skating Club under the guidance of the coaching team of Pasquale Camerlengo, Anjelika Krylova, and Natalia Annenko-Deller.

On April 13, 2015, Hubbell and Donohue announced that they had started training with Marie-France Dubreuil and Patrice Lauzon at the Centre Gadbois in Montreal.

[48] In November 2015, Hubbell and Donohue won their first Grand Prix title, taking gold at the 2015 Trophée Éric Bompard in Bordeaux as a result of their first place in the short dance, ahead of Canada's Piper Gilles and Paul Poirier.

Ranked third in both segments at the 2017 U.S. Championships, Hubbell and Donohue remained national bronze medalists for a third consecutive year.

In March, Hubbell and Donohue won a small bronze medal for their short dance at the 2017 World Championships in Helsinki, Finland.

After taking bronze at the 2017 Skate Canada International and silver at the 2017 NHK Trophy, they qualified to their third consecutive Grand Prix Final.

In the short dance, they placed third, behind Tessa Virtue and Scott Moir and Gabriella Papadakis and Guillaume Cizeron, and 0.02 points ahead of the Shibutanis.

[54] In the free dance, they unexpectedly dropped to fourth place following multiple errors, including receiving only a base level on their stationary lift after it was deemed non-stationary.

As a result, they finished off the podium behind Chock and Bates, Kaitlyn Weaver and Andrew Poje, and Gilles and Poirier.

[63] Third in the free dance after having revised nine of the program elements in the interim since Skate Canada International, they won the bronze medal overall.

[64] Entering the 2020 U.S. Championships seeking to win a third consecutive title, they placed second in the rhythm dance, with Donohue slightly losing balance at one point in the Finnstep pattern and their lift being graded at only a level 3.

[66] Returning to the Four Continents Championships after the disappointment of the previous year, Hubbell and Donohue won the rhythm dance again, albeit by a margin of only 0.03 over Chock and Bates, and 2.03 points ahead of Gilles and Poirier in third.

[69] Hubbell and Donohue recruited former training partner and double-Olympic champion Scott Moir as one of their choreographers for the new season, planning to regain momentum lost in the previous year, which they attributed in part to losing confidence in their programs after their loss at Skate Canada.

[76] Hubbell and Donohue placed second in the rhythm dance, two points behind Sinitsina and Katsalapov of Russia and narrowly ahead of Chock and Bates.

[78] Their placement combined with Chock and Bates' fourth qualified three berths for American ice dance teams at the 2022 Winter Olympics.

[81] On the Grand Prix, Hubbell and Donohue began at 2021 Skate America, competing against primary domestic rivals Chock and Bates.

They won both segments of the competition to take the gold medal, their fourth consecutive at the event and prevailing over Chock and Bates by 1.31 points.

Donohue remarked afterward on his "overwhelming gratitude, being our last Skate America and four consecutive wins for us, it means quite a lot, especially to be able to have a live audience" following the pandemic restrictions in the preceding year and a half.

[83] With training partners Papadakis and Cizeron also assigned to the event, Hubbell and Donohue were the presumptive silver medalists, and finished second in both segments of the competition despite a late-program flub on their free dance choreographic lift.

Hubbell joked afterward, "we made a mistake at the end, but sometimes you jump in the air, and you hit your partner in the crotch.

"[84] Their results qualified them to the Grand Prix Final, but it was subsequently canceled due to restrictions prompted by the Omicron variant.

[85] Seeking to defend their title at the 2022 U.S. Championships, Hubbell and Donohue placed second in the rhythm dance due to errors, ending up 2.55 points behind Chock and Bates.

They scored a new personal best of 86.56 to win the segment, securing ten points for the American team and notably prevailing over reigning World champions Sinitsina and Katsalapov of the ROC.

With Papadakis and Cizeron taking the gold medal and Chock and Bates the bronze, the entire podium consisted of skaters from the Ice Academy of Montreal.