Should I start Brock Purdy or Patrick Mahomes in Week 9?

The market-based projections

Brock Purdy's market-based projection is 22.0 PPR points a game, built from 5 markets across 14 market sources. That is the 4th highest figure of the 225 players with a market-based projection.

Patrick Mahomes's market-based projection is 21.2 PPR points a game, built from 5 markets across 10 market sources. That is the 7th highest figure of the 225 players with a market-based projection.

Where the draft room stands

Live drafts hold no current pick on Brock Purdy, and the board ranks him 45th overall on the rest of his evidence.

Live drafts hold no current pick on Patrick Mahomes, and the board ranks him 48th overall on the rest of his evidence.

This season so far

Through Week 7, Brock Purdy has been on the field for 98 percent of SF snaps, dropped back 231 times and thrown 7.9 air yards an attempt.

He has been sacked or hit on 26 of 231 dropbacks and scrambled 15 times.

In Week 5 against SEA he completed 19 of 29 passes for 189 yards, threw 2 touchdowns and 1 interception and ran 3 times for 8 yards.

In Week 6 against WAS he completed 21 of 29 passes for 264 yards, threw 1 touchdown and 0 interceptions and ran 5 times for 28 yards.

In Week 7 against ATL he completed 27 of 39 passes for 288 yards, threw 1 touchdown and 2 interceptions and ran 2 times for 5 yards.

Through Week 8, Patrick Mahomes has been on the field for 100 percent of KC snaps, dropped back 254 times and thrown 5.8 air yards an attempt.

He has been sacked or hit on 41 of 254 dropbacks and scrambled 13 times.

In Week 6 against LAC he completed 23 of 30 passes for 272 yards, threw 0 touchdowns and 1 interception and ran 3 times for 19 yards.

In Week 7 against SEA he completed 19 of 33 passes for 165 yards, threw 0 touchdowns and 1 interception and ran 2 times for 14 yards.

In Week 8 against DEN he completed 30 of 41 passes for 321 yards, threw 3 touchdowns and 0 interceptions and ran 2 times for 6 yards.

Their 2025 seasons

In 2025 Brock Purdy played 9 games and scored 187.4 PPR points, 20.8 a game, finishing QB24.

He threw for 2167 yards on 284 attempts with 20 touchdowns and 10 interceptions, and ran for 147 yards and 3 touchdowns.

That came to 31.6 attempts a game at 7.6 yards an attempt.

He was on the field for 98 percent of the snaps in the games he played.

In 2025 Patrick Mahomes played 14 games and scored 296.7 PPR points, 21.2 a game, finishing QB11.

He threw for 3587 yards on 502 attempts with 22 touchdowns and 11 interceptions, and ran for 422 yards and 5 touchdowns.

That came to 35.9 attempts a game at 7.1 yards an attempt.

He was on the field for 97 percent of the snaps in the games he played.

Patrick Mahomes was available for 5 games more.

Head to head

In 2025 Patrick Mahomes scored 21.2 PPR points a game and Brock Purdy 20.8, 0.4 a game between them.

Brock Purdy finished QB24 that year and Patrick Mahomes QB11.

Patrick Mahomes had 218 more pass attempts than Brock Purdy, 502 to 284.

Patrick Mahomes had 1420 more passing yards than Brock Purdy, 3587 to 2167.

This season Patrick Mahomes holds the bigger snap share, 100 percent against 98 percent.

Their target share this season is the same, 0 percent each.

Byes and availability

Brock Purdy is off in Week 8 and Patrick Mahomes in Week 5, so either can cover the other's bye.

What would change the answer

0.7 points a game is the entire case. The market restates it every week, and a line that moves moves the order with it.

The draft market is the half that is missing: when live drafts hold these two again they can order them differently from the projection, and this page will follow the drafts rather than the market-based projection when they do.