And Dyer and Sammy helped the Smogs on their way to promotion to the Premiership.
I'm sure a lot of fans questioned Tony Mowbray's logic in bringing Dyer back up North, after the player has struggled for years to rid himself of his injury woe.
But his goal has gone a long way to help Boro's cause and kept up the pressure on the teams in the play-offs.
While Hull's convincing home win over Birmingham saw Cardiff's lead at the top cut to five points after their first away defeat in 10 games.
Ameobi, who joined on loan this week, headed over the bar from Grant Leadbitter's free-kick after just three minutes as the hosts started on the front foot.
And Cardiff failed to heed the warning and fell behind after 13 minutes when former England international Dyer tapped home from Ishmael Miller's ball across the edge of the six-yard box.
It ended a long wait for the ex-Newcastle man, who last scored a league goal against Watford in May 2007, and the home fans had further cause for celebration just four minutes later.
Ameobi showed superb control and balance to create space inside the box and he curled a beautiful effort past the helpless David Marshall.
In doing so he became Boro's 20th different goalscorer of the npower Championship season, creating a new club record.
Cardiff pulled one back and controlled possession the late stages of the game but Fraizer Campbell, who had managed five goals in his last five matches, could only head wide from Whittingham's cross at the death.