Week 1 was full of injuries (and a lot of them entering the week, even). We also saw depth chart surprises in the opening weekend that point to some priority waiver wire additions.

Here are some of the best additions you can make to your squads based on everything we know so far. (I'll stick to players rostered on 60% of Yahoo teams or fewer and also list some other viable pickups who may be available in shallower leagues or relevant only in deeper leagues).

Quarterbacks

Jameis Winston, New Orleans Saints

Roster Percentage: 43%

Jameis Winston's five-touchdown performance didn't lead to the biggest sample size, but we can extrapolate. Winston threw just 20 times and completed 14 passes for 148 yards and the aforementioned 5 touchdowns. That led to a 7.4 yards per attempt average and a Passing Net Expected Points (NEP) per drop back of 0.94, easily best of the Week 1 slate of games (NFL average is typically around 0.12 in recent, pass-friendly seasons).

Winston and the New Orleans Saints will travel to face the Carolina Panthers next week. While it's a divisional matchup, it's hard to argue against Winston as the preliminary top streamer of Week 2.

Others to Consider:
Tyrod Taylor (4%; at Cleveland), Teddy Bridgewater (11% at Jacksonville)

Running Backs

Elijah Mitchell, San Francisco 49ers

Roster Percentage: 7%

When news broke that Trey Sermon was a healthy scratch, eyes turned first to Raheem Mostert and then to Elijah Mitchell. Mostert wound up playing only four snaps, via NextGenStats, before leaving with a knee injury.

That paved the way for Mitchell to play 63.6% of the team's snaps -- 35 in total -- and rack up 104 rushing yards on 19 carries with a rushing score. Mitchell didn't run a route, let alone get targeted, but the team as a whole threw just 26 times.

Mark Ingram, Houston Texans

Roster Percentage: 20%

Mark Ingram and the Houston Texans scored a surprising 37-21 win over the Jacksonville Jaguars, and he wound up leading the charge in the Texans' three-headed running back committee. Ingram played 45.3% of the team's offensive snaps (neither David Johnson nor Phillip Lindsay cracked a 30.% rate).

Ingram also dominated the carries with 26 for 85 yards and a score. Lindsay, by contrast, had 8 for 25 and a score, and Johnson ran 3 times for 10 yards.

Kenneth Gainwell, Philadelphia Eagles

Roster Percentage: 8%

The Philadelphia Eagles' backfield belonged primarily to Miles Sanders, but it's clear that Kenneth Gainwell is the next man up. Sanders handled 15 carries, and Gainwell had 9. Only quarterback Jalen Hurts (seven rushes) also ran the ball.

Gainwell also earned three targets, trailing Sanders' five. Again, it's Sanders' show for now (65.7% of the snaps for Sanders and 35.8% for Gainwell), but we are looking at a two-back committee, as Boston Scott played just 12 special teams snaps and zero offensive snaps.

Tony Jones Jr., New Orleans Saints

Roster Percentage: 23%

Tony Jones Jr. will have minimal standalone value this season if Alvin Kamara is healthy, but if the Saints are going to beat teams by 35 points, then he just may.

Jones Jr., in Week 1, wound up playing on 33.3% of the Saints' snaps (20 total). He earned a carry on more than half of those snaps (11) for 50 rushing yards. He's got claim to the old Latavius Murray role for the foreseeable future.

Others to Consider:
Latavius Murray (62%)/Le'Veon Bell (46%), Tevin Coleman (32%), Larry Rountree (1%), James White (34%), David Johnson (52%)

Wide Receivers

Nelson Agholor, New England Patriots

Roster Percentage: 33%

Nelson Agholor actually tied with Jakobi Meyers as the team leader in routes run (38) in Week 1, and though Meyers led the way with 9 targets, it was Agholor coming through with a team-high 72 receiving yards and the lone touchdown reception.

Agholor did that on seven targets of his own, a strong mark in a role that solidifies him as Mac Jones' second option in the passing game.

Christian Kirk, Arizona Cardinals

Roster Percentage: 13%

Tying receivers to a Kyler Murray-led passing offense is generally a good idea. Christian Kirk went a perfect five-for-five on his targets in Week 1, efficiency it feels like we've seen from him before.

Kirk's catches led to 70 yards and 2 touchdowns for a perfect passer rating of 158.3. Notably, he ran 22 routes, trailing DeAndre Hopkins (32) and A.J. Green (30). However, we once again saw Green be hyper-inefficient: 2 catches on 6 targets for 25 yards. Kirk could retain a role while Rondale Moore (14 routes) gets more acclimated and while Green, perhaps, is scaled back.

Sterling Shepard, New York Giants

Roster Percentage: 39%

The New York Giants' offense didn't have a lot of bright spots during their 27-13 loss to the Denver Broncos, but Sterling Shepard was one of them.

Shepard led the team with 9 targets, 7 catches, and 113 yards -- and also 36 routes. He commanded a 10.2-yard average depth of target, which is a little shy of last year's NFL average for receivers (10.8), but it's in the ball park of relevance when tied to a high-volume workload.

Terrace Marshall Jr., Carolina Panthers

Roster Percentage: 20%

Terrace Marshall Jr. drew six targets in the opener, ranking him third on the team behind running back Christian McCaffrey (nine) and fellow receiver D.J. Moore (eight). Marshall caught only half of the looks for 26 yards.

However, he had a downfield shot, an end zone target, and a designed screen play from inside the 15 go his way. The creative looks should be a precursor to bigger things in upcoming weeks.

Others to Consider:
Mecole Hardman (62%), Cole Beasley (45%), Cedrick Wilson (0%), Zach Pascal (1%), Tim Patrick (1%), Danny Amendola (0%), K.J. Osborn (0%)

Tight Ends

Jared Cook, Los Angeles Chargers

Roster Percentage: 26%

Jared Cook was quite involved in the Los Angeles Chargers' offense in Week 1, a game that led to 8 targets, 5 catches, and 56 yards for the former Saint. Cook's 29 routes placed him on the low end of the Chargers' receiving corps behind Mike Williams (41), Keenan Allen (39), and Jalen Guyton (35), but nobody else ran more than 11.

We'll see brighter, more fruitful days from Justin Herbert and the crew after a tough matchup against the Washington Football Team on the road at 1:00 pm. That includes next week against a Dallas Cowboys team that just got dominated by Rob Gronkowski.

Others to Consider:
Dalton Schultz (1%), Juwan Johnson (10%)