Marcelo Casas

On 10 December 2010, it was reported that Casas' former youth club, Primera División Paraguaya team Libertad would sue Panathinaikos for breach of trust.[3] Casas travelled to Greece in 2009 to trial with Panathinaikos after Libertad received an invitation from Panathinaikos to trial the player for 30 days.[3] According to Libertad, Panathinaikos asked Libertad for a one-month extension as the player was passing the trials. In that time, Panathinaikos convinced Casas to continue at the club without Libertad's permission, using the invitation as a trick, and the player signed for the club when he turned 18 years old.[3] Libertad detailed that the club deserved expenses due to forming the player:

"We brought him from the interior, we looked after him, we gave him food, we gave him home health, we formed him for four years to become a Libertad player and he is taken. It is a similar case to Juan Iturbe".[3]

The player signed with the club on a Spanish passport,[2] and was team mates with Greece under-21 player Giorgos Machlelis and Australia under-20 player Robert Stambolziev.

Casas featured for 22 de Septiembre during the 2015 Primera División B Nacional.[4][5] In October 2015, he featured during the promotion play-offs against Liga Ovetense as the latter eventually gained promotion to the 2016 División Intermedia.[6] Subsequently, 22 de Septiembre were then forced to play a promotion play off against the runner-up of the Primera División B Metropolitana in order to ascend to the 2016 División Intermedia. In November 2015, Casas featured in both fixtures of the play-off against Club Fulgencio Yegros as 22 de Septiembre were defeated 4−2 on penalties after a 2−2 aggregate score.[7][8]

Casas made his first appearance for the club in Round 1 of the 2016 División Intermedia, playing a full 90 minutes of a 3−2 away victory against Ovetense.[1] He then played a full 90 minutes in a 4−0 thrashing against Sport Colombia the following week.[9] He would not play again until round 7 in a 1−0 away defeat against Sportivo Iteño.[10] On 10 July 2016, he scores for the club in a 1−1 draw vs Ovetense.[11][12]

Casas rejoined Club 22 de Septiembre in 2017 as they were promoted to the División Intermedia having won a promotion play off, the same promotion play off that the player had played in during 2015.[13]

In 2019, Casas played for Encarnación team Athletic FBC in Paraguay's third-tier.[14]

In June 2021, Casas played in a 3–0 away victory against Sportivo Ameliano.[15] In August 2021, he played in a 1–0 victory against General Díaz.[16] In September 2021, he scored in the first goal in 30th minute of a 2–1 home victory against Sportivo Iteño.[17][18] In September 2021, he played in a 2–0 away defeat against General Caballero JLM.[19]

• Panathinaikos:
  • Superleague Greece: Runners-up: 1
    • 2010–11
• 22 de Septiembre
  • Primera División B Nacional: Runners-up: 1
    • 2015