She is signed to Total Nonstop Action Wrestling (TNA) where she also uses the ring name Courtney Rush, where she is a member of Decay and The Death Dollz and makes appearances for WWE's NXT brand.

[8] Competing as Casey Maguire, she made her in-ring debut for PTW on January 30, 2008, in a losing effort against Haley Rogers.

[21] In March 2011, she faced Mena Libra,[22] Daizee Haze[23] and Kellie Skater[24] as Courtney Rush as part of the main SHIMMER division but lost to all three.

[29] On April 13, 2013, Rush defeated Athena, Madison Eagles and Saraya Knight in a four-way match to earn her first shot at the Shimmer Championship.

[31] Rush would suffer a fractured collarbone in September 2013, forcing her to miss SHIMMER's October 2013 shows,[32] but she returned for Volume 62 in April 2014, where she lost to Mercedes Martinez.

Her first appearance took place on the January 26 episode of Impact Wrestling, in which she appeared on stage, dressed as a macabre cheerleader, speaking in riddles while Crazzy Steve and Abyss attacked TNA Tag Team Champions The Wolves and stole their title belts, thus forming a heel stable called Decay.

After making sporadic appearances throughout the year, mostly as a valet for Steve and Abyss,[37][38] Rosemary made her in–ring debut on the April 26 episode of Impact Wrestling, defeating Gail Kim.

[49] Few weeks later, on the March 2 episode of Impact Wrestling, Rosemary would go on to defeat Jade once again, this time in a last knockout standing match, to retain her championship and end their rivalry.

[65][66] In December, Rosemary failed to regain the once again vacant Impact Wrestling Knockouts Championship as she was defeated by Laurel Van Ness in a tournament finals.

[71][72][73][74][75][76] On January 6, 2019, after an eight months absence off television, Rosemary returned at Homecoming as she saved Kiera Hogan from an attack by her former friend Allie and Su Yung.

[85] The two wrestled into a double count-out and continued to brawl backstage, when Rosemary wrapped a noose around Susie's neck and resurrecting Su Yung.

[89] This led to Decay reuniting at the Hard To Kill pay-per-view and winning against Dashwood and Kaleb in an intergender tag team match.

[90] Black Taurus was introduced as the new member of Decay, where he teamed up with Rosemary and Steve at No Surrender as they faced Tenille Dashwood and XXXL (Acey Romero and Larry D) in a winning effort.

[92] On October 23, at Bound for Glory, Decay lost their titles to the debuting team of The IInspiration (Cassie Lee and Jessica McKay), ending their reign at 98 days.

[96][97] On August 12, 2022, during the tapings of Impact!, Rosemary and Valkyrie lost the titles to VXT (Chelsea Green and Deonna Purrazzo).

On October 7, at Bound for Glory, Rosemary went with Jessicka and Valkyire who defeated VXT to win the Knockouts World Tag Team Championship.

In their reign, The Death Dollz defended their title against many contenders, such as Savannah Evans & Tasha Steelz, & The Hex (Allysin Kay & Marti Belle).

On February 26, 2023, during the tapings of Impact!, Rosemary with Taya Valkyrie defended the Knockouts World Tag Team Championship against The Coven (KiLynn King & Taylor Wilde) to which they lost, ending The Death Dollz's reign at 142 days.

They both later defeated MK Ultra to win the TNA Knockouts World Tag Team Championship for a third time,[105] only to lose it back to them a month later at No Surrender.

[107] The duo would then challenge Spitfire for the TNA Knockouts World Tag Team Championship at Bound for Glory, in which they would lose.

[109] This would lead to a match between Grace and Rosemary at Final Resolution, which would end in a no contest, after interference from a returning Tessa Blanchard.

The match ended with Sexy Star submitting Rosemary for the win with an armbar, reportedly popping her arm out of its place legitimately in the process.

[115] Courtney Rush has also acted in several independent movies, including Monster Brawl (where she played Witch Bitch),[116] Exit Humanity and Beat Down.