Juan Carlos "Toto" Lorenzo (Spanish pronunciation: [xwaŋ ˈkaɾlos loˈɾenso]; 27 October 1922 – 14 November 2001) was an Argentine football player and coach.

He was transferred to Boca Juniors in 1945, and after two years he joined Italian side Sampdoria team, where he remained until 1952.

[4] The next year, he returned to Boca Juniors amid great pressure (rivals River Plate had just won back-to-back titles), and started one of the most successful periods in the history of the club.

In his four-year tenure, Lorenzo and Boca took two local and three international titles, including the 1977 Intercontinental Cup (played in 1978).

In the defense, Vicente Pernía in the right and Alberto Tarantini in the left complemented centrals Francisco Sá and Roberto Mouzo.