I'm not a guru, but the Cavs are able to play 3 big men because:
- Two of the three 7 footers are mobile help defenders that can defend in space and alter shots in the paint without fouling.
- All of them are good enough to switch out to deny an open shooter
- All three front court players have very good basketball IQ & know the scheme
- Mobley is a tube of wicked crazy glue from outer space that patches cracks as fast as they show up
Markkanen is the best wing with an outside shot so he plays. He's not mobile enough to switch or do reliable man-man so he's got to be in a zone. He's been aware enough to pick up the correct guy on defense, which is all the team needs. Markkanen is moble enough to cover an exposed shooter while the rest of the team recovers.
Keeping the guards in a 2 man zone helps prevent opponents from using picks to get an open shooter. Cavs have the option of switching on the perimiter and letting opponents roll into the paint if they really want to try that.
The Cavs can allow perimeter penetration because Allen and Mobley can smother it in the paint
So when teams follow the small ball handbook try to create an expoitable matchup, they end up with one of these:
- A guard in the paint lost among the trees
- Long pull up 2 that's often contested
- Mobley on the ball handler at the top of the key
All of those are good things for the Cavs.
I post this article last week.
How could Bickerstaff make it work, especially with three of the frontcourt pieces -- Mobley, Love and Markkanen -- viewed as natural power forwards?
www.cleveland.com
That article makes a good point that this also manages to work on offense well enough that opponents can't sag back into the paint. Allen cuts, Markkanen shoots, and Mobley does the Mobley. That limits what opponents can do on defense. Smallball often uses a switching defense and it's pretty hard to switch a guard onto any of those guys.
So in summary: Having one mobile help defender is nice. Having two is rare. Having two that can coexist on offense is unique. Markkanen also participated
edit: rearranged some of the points to make it flow better--