T.J. Dillashaw informs the UFC that he is retiring after his most recent shoulder surgery

T.J. Dillashaw, has informed the organisation that he will no longer compete in mixed martial arts.

[{"selector":"#anim-cbd0a78f-6cf7-4453-ab78-971671f0aee8 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(12.514648210040342%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.14,.34,.47,.9)","fill":"forwards"}] [{"selector":"#anim-28c87259-19ce-4d86-b1f9-e9baf2f4b3e6","keyframes":{"opacity":[0,1]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-f0324fbb-d399-4bbc-931f-1d2ff60a9172","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

Dillashaw's manager, had informed the promotion of the fighter's desire to retire.

[{"selector":"#anim-6678c756-a1c1-4356-a77e-692fe7bbdb9e [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(31.249999886225726%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.14,.34,.47,.9)","fill":"forwards"}] [{"selector":"#anim-721df0d3-ee70-4544-a0e4-2727c993517c","keyframes":{"opacity":[0,1]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-332628aa-c36c-43cb-975a-008ddc419850","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

The news was initially announced on Twitter by Michael Wonsover.

[{"selector":"#anim-28d3b880-2bc3-448c-8cbc-c5c53c044324 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(12.514648210040342%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.14,.34,.47,.9)","fill":"forwards"}] [{"selector":"#anim-51c5acf1-6393-4d1e-a6ef-13983db598ee","keyframes":{"opacity":[0,1]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-1ee0aa3e-de67-4ce4-adec-2d8f5054b764","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

Dillashaw made the decision to retire after having to have yet another major surgery to repair shoulder damage.

[{"selector":"#anim-b2854126-0b22-433f-81f3-e7c2d1414ede [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(26.587605060688897%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.14,.34,.47,.9)","fill":"forwards"}] [{"selector":"#anim-1dd89b6b-531d-4f97-b9ea-01f26b726785","keyframes":{"opacity":[0,1]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-302b9cbb-4bee-4aa9-b0e8-14d09bb75f49","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

It was caused by his most recent defeat against Aljamain Sterling at UFC 280.

[{"selector":"#anim-b08e6b65-39f0-47b1-abbf-81e4a19c29cb [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(12.514648210040342%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.14,.34,.47,.9)","fill":"forwards"}] [{"selector":"#anim-2a8e9c22-c789-4f97-b1b4-7cbecac241e0","keyframes":{"opacity":[0,1]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-3e029cb8-ee03-438c-92cd-91e52232303d","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

The decision was made as a result of the realisation that that was ultimately a bridge too far for Dillashaw to expect any reasonable timeline to return to action.

[{"selector":"#anim-0efbc6e4-4fef-4d57-8b47-c78e2a962de6 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(31.249999886225726%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.14,.34,.47,.9)","fill":"forwards"}] [{"selector":"#anim-204bd95b-28bf-4356-bf23-0943fabcc3dd","keyframes":{"opacity":[0,1]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-838a0889-e548-4c3e-84b4-b2967e892873","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

he had tested positive for EPO and received a two-year suspension.

[{"selector":"#anim-b0cf79ae-c8cc-4e85-9426-154f87b383e5 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(12.514648210040342%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.14,.34,.47,.9)","fill":"forwards"}] [{"selector":"#anim-797f5605-2fd6-4d01-9c6b-36824617e223","keyframes":{"opacity":[0,1]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-bfe5ddf6-2e9f-4511-be37-93f9aec4613d","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

When he eventually came back, he defeated Cory Sandhagen before losing to Sterling.

[{"selector":"#anim-a59ab44d-1294-4eda-9bbf-812c7b4daea1 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(7.812499744007886%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.14,.34,.47,.9)","fill":"forwards"}] [{"selector":"#anim-424bec9e-088e-4184-9e34-c490804bf30f","keyframes":{"opacity":[0,1]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-1b7052da-d70f-490c-a784-6723e2af005e","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]

Dillashaw leaves the sport with a career record of 17-5.

[{"selector":"#anim-764bf61d-1211-4280-9d7d-d6d0f9ffc290 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(12.514648210040342%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.14,.34,.47,.9)","fill":"forwards"}] [{"selector":"#anim-ec2d490c-347d-4e46-a537-3cef5563d9ab","keyframes":{"opacity":[0,1]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-da6e3a6d-af5a-462a-929f-c6a37e6bfd47","keyframes":{"transform":["scale(0.3333333333333333)","scale(1)"]},"delay":0,"duration":500,"easing":"cubic-bezier(.3,0,.55,1)","fill":"forwards"}]