BROOKLYN, Mich. -- A number of issues have plagued Red Bull Racing this season, however, getting wrecked by a teammate Sunday at Michigan International Speedway was the tipping point for Scott Speed.

Just before the halfway point of the 200-lap race, the No. 83 of Casey Mears -- filling in for Brian Vickers who is sidelined six months with a blood clotting disorder -- made contact with Speed sending Speed's No. 82 machine spinning in Turn 2 (watch video).

“

Both of us were struggling but [Mears] wrecking us like that -- I mean is ridiculous. Whenever you're at Hendrick [Motorsports] and Richard Childress Racing and then you still don't have a ride and haven't done anything there's no real excuses after that.

”

-- SCOTT SPEED

Both Mears and Speed were racing near the rear of the field when the contact occurred. Mears went to the garage and finished 36th while Speed went on to finish 28th.

Visibly frustrated exiting the car, Speed wasn't ready to make any pardons for Mears' actions after the race.

"Both of us were struggling but [Mears] wrecking us like that -- I mean is ridiculous," Speed said. "Whenever you're at Hendrick [Motorsports] and Richard Childress Racing and then you still don't have a ride and haven't done anything there's no real excuses after that, but whatever."

As for any explanation for the incident, Speed's only response: "Ugh, IQ level."

Mears, who began the season with Key Motorsports after being released from RCR last season, could not be reached for comment.

Despite the struggles, Speed said the start of the season looked relatively promising with a top-10 finish at Atlanta and a front row start at Phoenix, but the bottom fell out after a 15th-place finish at Talladega.

Since then, Speed has struggled to post a finish higher than his Pocono performance of 20th and he is 26th in the Cup Series point standings after Michigan.

To remedy performance issues, Red Bull Racing swapped crew chiefs between the No. 82 and No. 83 before Pocono last week putting Ryan Pemberton with Speed and Jimmy Elledge with Mears.

"It was good for our team," Speed said. "Half the team switched basically and you realize where the weak links are on each team, what everyone likes about each team and communication as well. But we only have two cars here. We are going up against guys that have four or five. And it is especially difficult when you're switching drivers and plugging people in ... it makes it hard to get momentum going."

Next weekend at Infineon Raceway, a road course race, Mears will be out and two-time German Touring Car Series champion Mattias Ekstrom will drive the No. 83.

Related:
• Ekstrom earns Cup ride for Red Bull Racing at Infineon
• Swap designed for Vickers' return and Speed's future
• Elledge, Pemberton swap roles at Red Bull Racing