Instead, he was glad Adam Selwood sent the kick deep towards Nic Naitanui.
"I was trying to get the handball over the top from Sellers (Adam Selwood), so I could have a ping," Rosa said after the Eagles' thrilling two-point win.
"Lucky he kicked it in to the big fella. He took the great pluck and then slotted it.
"It was just an amazing feeling to see it go through."
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Rosa, like so many of his teammates and coaches who were interviewed after the Eagles' remarkable victory, had full faith in Naitanui kicking the goal after the siren.
"I backed him in. He's great under pressure. Not too much fazes him. I thought it was in pretty good hands."
Rosa, 26, was simply happy to be out there in just his second game of the season after a freak quad injury following a pre-season match against Port Adelaide.
"It was a bit of a weird one. I copped a knock up in Alice Springs.
"I was sitting in the team meeting on the Monday and my leg just starting blowing up."
The swelling became so great in Rosa's left quad that the doctor had to call the club surgeon.
"I was in surgery within half an hour. They opened it up and released the pressure, and then you just have to let it heal."
What happened is commonly termed compartment syndrome, which can be threatening to limbs in severe cases.
"The pressure in the muscle builds up until it's got nowhere to go, so they need to open it up and release the pressure," Rosa said.
"It was a bit of a funny one. I wasn't really expecting it from a knock, a couple of days later. Feels good now though."
Rosa was inactive for more than a month, and he then had to regain touch and fitness with three outings in the WAFL, which he felt was very important.
"It's really hard to come back into the intensity of AFL now. I probably spent three or four weeks with my leg up in a bed.
"To just get match fitness back, which you can't really get on the track … I think it is getting harder in the AFL to come back in after a big lay off."
Rosa has been unlucky with injuries at the wrong time over the past two years.
He has missed four of West Coast's past five finals despite playing most of the home and away matches in both seasons.
"Hopefully it's the opposite way around this year and I'm playing towards the pointy end of the year."
