49ers rookie safety Marques Sigle in position to start Week 1 as newest ‘Sultan of Swarm’ (paywall) “A certain route concept gave Sigle some trouble. Saleh, as his job demands, attempted to walk the 23-year-old through the play. What went right, wrong, etc. But the rookie cut him off, so as to work through his own mental checklist. Saleh watched the play back after practice; everything Sigle said checked out.

“Some are quick, like him, and some will need to see it three or four times,” Saleh said Thursday, having lauded Sigle’s readiness to play free or strong safety.

This preseason has largely confirmed what the analytics told the 49ers about Sigle. Look for the player with the ball. You’ll probably spot No. 36. Pro Football Focus gave Sigle an 85.9 tackling grade, which on a 100-point

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