Sorry to say this but the Spur who needs to level up the most this summer is Mitch Johnson. This is a coaching issue, not a talent issue.
Matt Schrader
peak in-game win probability for Spurs in finals losses:
game 1: 94.1% (Q3 6:31)
game 2: 90.9% (Q2 11:32)
game 4: 98.7% (Q4 9:33)
game 5: 97.1% (Q4 7:54)
image is game 5 nose dive