I have a recent Samsung flagship phone, and the same DSLR and lens as you. The DSLR is far superior for sports photography. My daughter plays indoor volleyball and smartphone pictures are garbage, just completely blurry due to the fast action. If I manually reduce the shutter speed then pictures are under exposed due to the tiny sensor. On the DSLR I can run it in shutter priority mode and push the ISO, so the results are pretty good (although a full frame camera would obviously be better).

The smartphone does pretty well in most other situations that don't involve fast movement in poor lighting.