Bellator star Cris Lencioni is currently "in his biggest fight yet" after suffering cardiac arrest earlier this month ... with a family member revealing he is currently receiving treatment in the ICU.
The featherweight's mother-in-law shared the tragic news on Monday ... saying the health-related incident happened on June 8.
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"As you can imagine this was completely unexpected considering he is only 28 and in peak physical condition," Angela Hibbard said on a GoFundMe page set up for Lencioni.
"We believe in the goodness of God, and we don’t know anyone with more will, strength, and determination than Cris.