Joaquín found the net in a 1–1 draw against Getafe CF on 15 September 2019, marking his 400th appearance for the green-and-whites – he also drew level with Julio Cardeñosa as the player with most Spanish top-tier appearances for Betis with 307. On 8 December, he scored an 18-minute hat-trick (the first of his long career) in a 3–2 home win over Athletic Bilbao, becoming the oldest player ever to achieve the feat in La Liga at the age of 38 years and 140 days, breaking the previous record of 37 years set by Alfredo Di Stéfano in 1964. At the end of the year, he agreed to an extension until 2021.