The game finished level at 1-1 following a 72nd minute abandonment, which was caused by midfielder Danny Jenkinson breaking his fibia and tibia in a 50-50 challenge.
Boro had taken the lead through Tom Corner, but a Dean Craig penalty in the second half restored parity.
Jenkinson went in for a full-blooded tackle with Boro’s Steve Mallory, which resulted in him being rushed to hospital.
Mancrief said: “Danny is one of those 100% players, he will always go for those tackles.
“He went for a similar one earlier in the game, but sadly he just got caught in this one.
“It was a 50-50 tackle, so there isn’t much more you can say about it.
“It was a pity because I think we were turning the screw at that point, the lads were playing well.
“The first half was tough, which is why I only played one up front. I thought we paid them too much respect, we weren’t getting into them enough.
“in the second half we started to knock it around a bit and I think we were on top.
“For a local lads they did really well, I’m really, really proud of them.”
Mancrief was also full of praise for the set-up at Silver Royd, which hosted the game.
He added: “This is where Scarborough should play in my eyes, it was a great crowd at a great facility.
“Cheap to get in, people enjoying football with a beer, you can’t beat it.”