NFL rookie D'Andre Walker is still in the early stages of his professional career, but is clearly cherishing his new-found wealth, sharing a mammoth dinner bill to social media on Tuesday.

Walker was a fifth-round pick in the NRL draft this year, currently on the injured reserve list for the Tennessee Titans. He was awarded a four-year rookie contract worth $A4 million ($US2.8 million), including a signing bonus of $A388,347.

Despite not yet making his NFL debut, Walker is already splurging his earnings, and shared a restaurant bill worth $A15,267 ($US10,487) to his Instagram. He posted the photo with the caption, "I'm bout to flip."

The meal's expense is equivalent to 4 per cent of his entire NFL signing bonus.

At Jeff Ruby's Steakhouse in Nashville, Walker and a cluster of his teammates consumed $8726 worth of steak and $4606 of alcohol in one sitting - someone also ordered a $5 lemonade.

The popular restaurant is known for their dry-aged steaks, with one variety worth $408 - eight were ordered by Walker and his crew.

Although the rookie is within his rights to spend his earnings however he desires, many were critical of the apparent splurge.

Bloomberg columnist Joe Nocera posted, "This is how athletes wind up bankrupt," in response to the photo.

Walker is an outside linebacker standing at 191cm. During his four-year stint in college football, he had 112 tackles with 13.5 sacks for the University of Georgia.

The Tennessee Titans will next face the New Orleans Saints on Monday.