Damar Hamlin's family released a statement Tuesday morning, expressing gratitude and asking that fans keep Hamlin in their prayers.

The second-year Buffalo Bills safety suffered cardiac arrest on the field after making a tackle during Monday night's game against the Cincinnati Bengals. He had his heartbeat restored on the field and then was taken to a local hospital. The Bills said early Tuesday morning that he was in critical condition.

The Hamlin family's statement came through Damar's marketing representative Jordon Rooney.

Much later on Tuesday, Hamlin's uncle Dorrian Glenn spoke with reporters and said his nephew had gone from being on 100 percent oxygen to 50 percent.

Glenn added that Hamlin needed to be resuscitated twice, once on the field and once after he arrived at the hospital, and there is a concern of lung damage.

NFL community rallies around Damar Hamlin

The sporting world had an outpouring of support for Hamlin after he collapsed on the field, and the family said it was "deeply moved" by gestures including the donations to a GoFundMe for Hamlin's annual toy drive. There were nearly $4 million in donations at the time of the Hamlin family's statement.

The Hamlin family also went out of its way to thank Bengals coach Zac Taylor and that organization for their support.

Bengals owner Mike Brown released a statement about Hamlin, praising the first responders for their actions as well as the players and fans for showing respect, love and compassion.

Pittsburgh Steelers head coach Mike Tomlin has known Hamlin, a Pittsburgh native, for over a decade, and spoke about the "respect and love" he has for Hamlin on Tuesday.