[1] He previously played for in the Allsvenska for IF Elfsborg, where they won the Svenska Cupen, and in MLS for the Houston Dynamo, helping the club win the U.S. Open Cup.

[6] On 26 April 2018, Major League Soccer club Houston Dynamo signed Lundkvist on a full transfer using targeted allocation money.

[1] He played one game on loan with the Dynamo's USL affiliate club Rio Grande Valley FC to regain match fitness.

[8] It was a poor season in the league however, with Houston finishing 9th in the Western Conference and missing out on the playoffs, with Lundkvist making 16 appearances and recording 1 assist.

Head coach Wilmer Cabrera's decision paid off in the 60th minute when Lundkvist sent in a cross that Mauro Manotas hit past goalkeeper Nick Rimando to give Houston a 1–1 draw with Real Salt Lake.

[8] On 12 March, Lundkvist was subbed on in the 19th minute of Houston's 2nd leg Champions League fixture with Tigres UANL when Beasley suffered an injury.

[12] Beasley was ruled out for 4–6 weeks, allowing Lundkvist to become the starting left back for the first significant stretch since he arrived in Houston.

In a shortened season due to the COVID-19 pandemic, Lundkvist started 21 of Houston's 23 games, with the only 2 he missed being the result of a suspension for a violent tackle.

[20][19] After missing a month, he returned to action on 20 October, coming on as a halftime substitute in a 3–0 loss to the LA Galaxy before playing the full 90 minutes for Houston's final 3 matches.