MIAMI GARDENS, Fla. (AP) — Tua Tagovailoa got the Dolphins off to a fast start in his return from a concussion, and Miami held on throughout a scoreless second half to beat the Pittsburgh Steelers 16-10 on Sunday night. The Dolphins (4-3) snapped a three-game skid that began on Sept. 29, when Tagovailoa was concussed in a loss at Cincinnati. He also took a hard hit four days earlier in a win over Buffalo that led to changes in the NFL’s concussion protocol.