The Dolphins used Caleb Johnson’s roster spot to sign safety Isaiah Johnson from the practice squad. Isaiah Johnson, a college cornerback at Dartmouth and Syracuse, was converted to safety this season.

The Dolphins placed Johnson (shoulder) on injured reserve Friday.

Caleb Johnson grew up a military brat and spent most of his life moving, but Texas will always be his home. Caleb’s passion for conservation and the outdoors stems from his countless days working on ranches. After serving in the United States Army, Caleb ...