
The 29-year-old centre forward has played for the Werkself since 2017 making 159 appearances and scoring 56 goals. The Argentina international signed for Bayer 04 five years ago from the top South American club River Plate.
"We thank Lucas for his commitment to Bayer 04 over the past few years. His six goals in the second half of last season made a valuable contribution to us achieving qualification for the Champions League," said Simon Rolfes, currently sporting director and from 1 July sporting managing director at Bayer 04. "We wish Lucas all the best for the future."

Bayer 04 have signed left-back Carolin Simon from champions Bayern Munich for the coming season. The 33-year-old former Germany international, who played for Leverkusen from 2013 to 2016, has signed a contract to 30 June 2028.
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Bayer 04 Women have strengthened for the coming season with the signing of Lobke Loone. The 23-year-old Dutch striker joins from Utrecht on a contract until 30 June 2028.
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The Werkself returned from the near one-month break in the Google Pixel Women's Bundesliga with a convincing victory at home. Roberto Pätzold's side beat SC Freiburg 4-1 on Sunday afternoon, with goals from Katharina Piljic, Estrella Merino Gonzalez, Cornelia Kramer and Carlotta Wamser ensuring a 13th win of the season at the Ulrich-Haberland-Stadion. The Black and Reds, who are now on 40 points, move up to fourth place at least overnight.
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The fifth consecutive derby win over 1. FC Köln was a hugely significant one in terms of the battle for the UEFA Champions League places. Goalkeeper Janis Blaswich, speaking for the whole team, dedicated the 2-1 victory in the cathedral city to the travelling support: "I'm especially happy about this victory for our fans!" Get the rest of the reaction from those involved and the media, as well as some impressive stats on two-goal hero Patrik Schick and a look at the all-time Bundesliga table, in the Werkself Review.
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