Postl started his career in the Fox Valley Wrestling Alliance (FVWA), under the ring name Hardcore Wonder.

[2] He also won the SSW Tag Team Championship with Devin Diamond, from The Pretty Hott Thangs (Ryan Kross and Josh Maxim) on May 19, 2006, in Oak Creek, Wisconsin.

[13] Little Bastard helped Finlay win the WWE United States Championship on the July 14 episode of SmackDown!

[22] He attacked Noble in the following weeks by shoving a pie in his face,[23] spraying him with a fire extinguisher, pushing him into Kane and causing him to get chokeslammed, and locking him in a large box.

when Acting General Manager Vickie Guerrero forced Hornswoggle to surrender the Cruiserweight Championship (which was later retired), citing that his status as Mr. McMahon's son and his diminutive stature would eventually jeopardize his well-being.

[25] Mr. McMahon began giving Hornswoggle matches against competitors that were much larger than him to show his son "tough love."

[28] Following the attack, as a part of the storyline, WWE.com announced that Hornswoggle had suffered internal injuries, including bleeding of the brain and spinal trauma.

[33] He made his in-ring return on the April 18 episode of SmackDown, defeating Matt Striker after a Tadpole Splash.

[35] At Night of Champions on June 29, Hornswoggle and Finlay challenged John Morrison and The Miz for the WWE Tag Team Championship, but failed to win.

Later on in the night, he got his revenge by helping the Raw guest hosts, Kyle Busch and Joey Logano, put DX against each other and John Cena for the WWE Championship at Survivor Series on November 22.

On the January 18, 2010, episode of Raw backstage, Hornswoggle and Triple H confronted Big Show, The Miz and Jon Heder.

Sometime later, Hornswoggle became jealous of O'Neil hugging AJ and eventually sent her a letter ending their relationship, as he no longer wanted to be on NXT and preferred to stay on SmackDown.

On November 29, 2011, holiday edition of SmackDown, Hornswoggle won a battle royal, by lastly eliminating Sheamus, to receive a wish from Santa Claus (Mick Foley).

With this ability, Hornswoggle became the special guest ring announcer for the David Otunga and Sheamus match on the following week's SmackDown.

On March 23 episode of SmackDown, Hornswoggle was added to Theodore Long's WrestleMania XXVIII team as its personal mascot.

He was injured (storyline) by Big E Langston on January 11, 2013, episode of SmackDown, after Khali and Natalya lost to Dolph Ziggler and AJ Lee.

He returned on March 17 episode of Raw, to celebrate St. Patrick's Day, only to be interrupted by Bad News Barrett.

On the April 15, 2014, episode of Main Event, Hornswoggle turned heel for the first time since 2007 after revealing himself as the mascot for 3MB (Heath Slater, Drew McIntyre and Jinder Mahal).

In July on Superstars, Hornswoggle accompanied Slater for his match with Adam Rose, and was kidnapped by the Rosebuds, who transformed him into a mini-Rose.

On August 19 episode of Main Event, Hornswoggle turned face once again when he joined his former rivals, Los Matadores (including El Torito), as their second valet.

[41] That same week, on Superstars, his name was tweaked to La Vaca (meaning "the cow"), when he teamed with El Torito to defeat Slater and O'Neil.

On September 29 episode of Raw, Hornswoggle reverted back to a heel and became Slater and O'Neil's (Slater-Gator) mascot, the Mini-Gator.

After the breakup of Slater-Gator, Hornswoggle took time off from WWE television to undergo arthroscopic shoulder decompression surgery in March 2015.

[46] Postl also signed to appear at a show co-promoted by Global Force Wrestling and WrestlePro under the ring name Swoggle and debuted for the promotion on June 11, facing Brian Myers.

On the December 15, 2016, episode of Impact Wrestling, titled Total Nonstop Deletion, Swoggle made an appearance as the partner of Rockstar Spud in the Tag Team Apocalypto match.

On January 19, episode of Impact Wrestling, he would then team up with Robbie E in a losing effort against Aron Rex and Spud.

[48][49] On October 24, 2020, Swoggle made another surprise return to Impact Wrestling at Bound for Glory 2020, where he competed in the Call Your Shot Gauntlet Battle Royal, which was won by Rhyno.

Swoggle made a cameo on the November 18, 2020, episode of AEW Dynamite during The Inner Circle's trip to Las Vegas.

The book Life Is Short And So Am I was officially released by ECW Press on September 10, 2019, and it included forewords by Postl's close friends Kofi Kingston and Curt Hawkins.