Tobias Gray, portrayed by Jeffrey Christopher Todd in a recurring capacity, made his first appearance on December 5, 2014. Tobias is a Jabot Cosmetics employee, working as a lab tech for Ashley Abbott (Eileen Davidson) who is developing a new fragrance. The casting call for Tobias, released in October, described the character as a lab technician in his mid 20s to early 30s who is "quirky" but also has a "cold, calculating Energy about him". The role was stated to be a major part, with the series looking for what they described as a "charactery" actor to play the role. In response, On-Air On-Soaps likened this description to the character Damien Spinelli (Bradford Anderson) from General Hospital with "an edge". Todd's casting was announced on November 3, having begun filming on October 24. Tobias is a lab tech in Jabot, working for Ashley, but quickly appears to be a spy hired by Victor Newman (Eric Braeden) to divulge details to him about Ashley's developing fragrance. Ashley realizes that Tobias is a spy for Victor, and feeds him misinformation about the scent. After showing up at an event at the Genoa City Athletic Club intoxicated, Tobias leaves and is involved in a fatal car crash. Before succumbing to his injuries, he manages to mention the name Austin. Evidence implicating him in the murders of both Austin and Courtney is then found in his hotel room by Kevin Fisher and Mariah Copeland. His final airdate is May 27, 2015.

Joe Clark, portrayed by Scott Elrod, made his first appearance in October 2014, as the ex-husband of Avery Bailey Clark (Jessica Collins). Avery cheated on Joe with Dylan McAvoy (Steve Burton), which led to the end of their marriage. Elrod, who joined The Young and the Restless as a regular, was previously noted for his roles in the feature Argo (2012) and the television series Men in Trees. A spokesperson for the soap opera stated that "Viewers can expect Joe to have more than a few tricks up his sleeve as he crosses paths with several key ‘Y&R’ characters." TV Guide's Michael Logan described the introduction of Joe as a "recipe of disaster" and wrote "Which Genoa City gal will benefit from Joe's handiwork?" In November 2015, it was confirmed that Elrod had been taken off contract and bumped to a recurring status; he made his last appearance on December 11, 2015.

Sage marries Nick, when the truth behind Adam's true identity comes out, putting a brief strain on her marriage to Nick. Sage becomes pregnant, giving birth to her son, Christian Newman prematurely. When Christian passes away suddenly in the weeks following his birth, it is revealed that Adam is the birth father of Christian, not Nick, unbeknownst to Sage's knowledge. Riddled with grief, Sage grows distant from Nick; the pair eventually reconcile and plan to adopt a child in an attempt to build their family together. When their planned adoption falls through, the pair agree to eventually try adoption again. Sage then grows an attachment to Sharon's son, Sullivan, who is later discovered to actually be Christian; confronting Sharon, Sage demands her son be returned to her. When Sharon refuses, Sage leaves and attempts to find Nick. Becoming distracted while driving on her cell phone, Sage enters into a car accident; discovered by Sharon, Sage holds Christian in her arms for the final time before dying on April 29, 2016, from injuries sustained from the accident.

The character appeared in a storyline which assisted the return of the character Adam Newman, after being recast with Justin Hartley. Adam has had excessive reconstructive surgery to look like her deceased grandson, Gabriel, and Constance believes that he is Gabriel. In actuality, the real Gabriel had died months prior saving Adam. Sage Warner (Kelly Sullivan), a woman who has been living with Constance for years since the death of her parents, is involved in the scheme to pass Adam off as Gabriel. Speaking of the character, Kellerman said: "She is a good person, and she doesn’t like her enemies. She is part of one family, and there is another family that has bad people in it (...) She loves her grandson and she loves Sage, and Sage loves her, too. Sage is caught in the middle of a lot of stuff; she is the character that is walking a fine line." Constance' health deteriorates and she is dying. Adam, as "Gabriel", goes to say goodbye to her. Constance tells "Gabriel" about her animosity towards Victor Newman (Eric Braeden), Adam's father, and the Newman family. This is due to the fact that Victor orchestrated a hostile takeover of Gabriel's father's company which led to him committing suicide. Constance asks "Gabriel" to avenge the death of his father.