Rotator cuff repairs have variable outcomes with high failure rates. A primary reason for this is the inability of the repaired tendon to recapitulate a functional tendon-bone insertion site (enthesis). The healing region promotes deposition of highly disorganized, scar tissue which results in an attachment with inferior properties. Developing new therapies that mitigate scar tissue formation while promoting regenerative healing is a critical need. We used a mouse model of rotator cuff injury and repair to examine the therapeutic potential of a novel gellan-based fluid gel containing decorin to reduce fibrosis and regenerate a functional enthesis. Treatment with the fluid gel containing decorin induced ectopic chondrogenesis by 28 days after surgery, Decorin treatment improved gait functionality reduced myofibroblast activation at early time points, but these effects were no longer seen by day 28. Interestingly, application of the fluid gel itself may improve functional outcomes.