Jalen Ramsey might be down after suffering a serious knee injury this offseason, but his faith clearly hasn't waned ... 'cause the Dolphins star just got a huge, new torso tattoo to honor his belief in his religion.
Andres Ortega and his Onder Ink team -- Abrianna, Allan, Sarahi and Gerardo -- flew down to Miami this week to put the tats on the cornerback ... while he continues to recover from meniscus surgery.
The new ink features several religious components -- including a bible with a sword, fruit, and a lamb.
There's also a lion, a warrior and a toy soldier -- items Ortega says Ramsey wanted to represent his role as a protector.
In total, the artwork took about eight hours to complete ... and Ortega tells TMZ Sports the football player ended up super happy with the finished product.
In fact, Ortega says Ramsey's looking for him to come back soon to tattoo a couple other things on the final bit of open space on his stomach.
As for the 28-year-old's injured knee -- Ortega tells us Ramsey seems to be recovering just fine ... and he was in great spirits throughout the process.