Star Mazda era (2009–2012)

In 2009, the team entered the Star Mazda series. The team was surprisingly strong in its first season, finishing second in the driver’s championship and third in the team championship with driver Peter Dempsey.^[4] In 2010 Juncos driver Conor Daly won the Star Mazda Championship, winning seven of the thirteen races. Juncos' other driver Tatiana Calderón finished tenth.^[5] In 2011 Daly left the team to advance to the Indy Lights series, and the team replaced him with driver João Victor Horto. Horto would finish the season fourth and Calderón sixth. Calderón finished third in the race at Barber Motorsports Park, becoming the first woman to achieve a podium finish in the series.^[6]

In 2012 Calderón left to race in the Formula Three series in Europe. Horto and Juncos moved up to the Indy Lights series on a limited basis, while the team signed Connor De Phillippi, Bruno Palli, Martin Scuncio, and Diego Ferreira for their Star Mazda cars.^[7] De Phillippi would win two races and finish fourth, while Scuncio would win one race and finish eighth after missing the season finale. Ferreira would finish sixth and Palli twelfth. Ferreira was named "Most Improved Driver of the Year.

Pro Mazda Championship era (2013–2018)

In 2013, the team would enter Ferreira and Scott Anderson in the series, now renamed the Pro Mazda Championship. Ferreira would finish second behind a dominant Matthew Brabham.^[8] Anderson finished fifth.

For 2014 the team entered four cars full-time in the series, driven by Spencer Pigot, Kyle Kaiser, Julia Ballario, and Jose Gutierrez. Juncos Racing started the year off on a high note, winning the Cooper Tires Winterfest Championship in both the team and driver (Spencer Pigot) championship.^[9] Pigot went on to win six of the fourteen races en route to a championship. Kyle Kaiser and Jose Gutierrez both took wins in the season finale at Sonoma.^[10] For 2015, Gutierrez returned to the team^[11] along with new drivers Will Owen,^[12] Timothé Buret^[13] and Garett Grist, who moved over from Andretti Autosport.^[14]

Indy Pro 2000 Championship era (2019–2022)

In 2019, the championship was rebranded into "Indy Pro 2000", following the departure of Mazda.^[15] The team would win the teams' championship that year, with Swedish driver Rasmus Lindh narrowly missing the top spot in the drivers' championship, finishing only 2 points behind champion Kyle Kirkwood.^[16]

The team's 2020 season saw American driver Sting Ray Robb clinch the drivers' title with two races remaining in the season.^[17]

First stint in the series (2017–2019)

In May 2015, Ricardo Juncos announced the team would be building a new facility in Speedway, Indiana (home of the Indianapolis Motor Speedway), with the intention of future participation in the IndyCar Series. The facility, called the Juncos Technical Center, would cost three million dollars and be 41,000 square feet in size.^[21] On May 9, 2017 it was announced that Spencer Pigot would rejoin Juncos for its IndyCar debut at the 2017 Indianapolis 500.^[22] The following day, the team announced veteran Sebastián Saavedra would drive a second entry for the team.^[23]

At the 2019 Indianapolis 500 Kyle Kaiser managed to qualify the team's lone entry onto the last spot for the starting lineup. While the team successfully qualifying for the Indianapolis 500 was not insignificant in itself, Kaiser and Juncos' effort is best remembered for knocking two-time Formula One world champion Fernando Alonso out of the starting line up for the Indianapolis 500, ending Alonso's joint McLaren/Carlin effort and creating one of the more notable underdog stories in the long history of racing at Indianapolis Motor Speedway.^[24]

Return to IndyCar Series (2021–present)

The team did not participate in the 2020 season, citing difficulties due to the COVID-19 pandemic as a reason. For the 2021 Indianapolis 500 Juncos leased their chassis to Paretta Autosport on behalf of Team Penske, with Simona De Silvestro driving the car. De Silvestro managed to qualify the Juncos car in the last available spot for the Indianapolis 500 but ultimately retired from the race.^[25]

Following investment by new team co-owner Brad Hollinger, Juncos was renamed to Juncos Hollinger Racing and returned to the series with a single entry for the last three races of the 2021 season, starting from the Grand Prix of Portland.^[26] On September 10, 2021, 2020 Formula 2 Championship runner-up and Scuderia Ferrari Formula One test driver Callum Ilott was announced as their driver for the remaining three rounds of the 2021 season, after initially being confirmed only for one race.^[27] He would finish 25th on his IndyCar debut, completing only 77 out of 110 laps due to a mechanical issue mid-race.^[28]

Juncos Hollinger Racing returned full-time in 2022, after the purchase of assets previously owned by Carlin.^[29] Ilott continued to race the No. 77 entry^[26][30][31] in all races except for the Detroit Grand Prix, as he was recovering from injuries sustained in the previous week's Indianapolis 500, with Santino Ferrucci standing in for the Detroit round.^[32] Ilott would return to the No. 77 from the Road America race until the end of the season, finishing 20th in the championship.^[33]

In September 2022, the team confirmed an expansion to a two-car entry for the 2023 season.^[34] In January 2023, four-time Turismo Carretera champion Agustín Canapino was announced as JHR's second full-time driver in the No. 78 car.^[35]

On October 26, 2023, Juncos Hollinger Racing announced the departure of driver Callum Ilott. In a statement, the team said, "After a period of collaboration and shared goals, both parties have mutually decided to part ways, effective immediately. Juncos Hollinger Racing would like to express its sincere appreciation for his contributions over the last two years."^[36]