Washington played its fourth preseason game at Tampa Bay, which moved the game up one day to avoid the remnants of a tropical storm. Rain still bombarded the stadium.

Washington played its fourth preseason game at Tampa Bay, which moved the game up one day to avoid the remnants of a tropical storm. Some still hit the stadium.

Washington played its fourth preseason game at Tampa Bay, which moved the game up one day to avoid the remnants of a tropical storm. Some still hit the stadium.

Washington Redskins General Manager Scot McCloughan likes to say that good teams aren’t defined solely by their starting lineups. Winning teams have quality players at all 22 positions. But they also boast great depth. That means two and sometimes three good options on the depth chart at many positions.

The Redskins can’t say that just yet. The roster still appears a bit thin at center, along the defensive line, possibly at outside linebacker, and maybe at running back.

But as the preseason drew to a close with Washington’s 20-13 victory at rain-soaked Raymond James Stadium, and with the final cuts — down from 75 players to 53 — due by 4 p.m. on Saturday, it’s clear that this Redskins roster trumps the 2015 Week 1 version.

Of the 22 impending cuts, some may never play in the NFL again. But a number of the soon-to-be former Redskins will find work elsewhere, and that’s a sign that McCloughan and his staff are getting the job done.

Gruden said eight to nine roster spots remained up for grabs entering Wednesday night’s game. But at least 13 bubble players appeared to turn in roster-worthy performances.

[Redskins close preseason with soggy win in Tampa]

Running backs Mack Brown and Rob Kelley entered the game vying for what could be the final spot on a three-man running back unit, along with Matt Jones and Chris Thompson. Kelley appears to have a leg up based on his play throughout the preseason, as he has averaged better than four yards a carry while receiving the heaviest workload. But neither back was willing to settle on Wednesday night. Brown racked up 147 yards on 17 carries — a 60-yard touchdown serving as his brightest moment — while displaying a good burst, shiftiness and keen field vision. Kelley added 99 yards on 16 carries while running with a blend of speed and power. He also continued to help his case with solid pass protection.

Could this team really get away with carrying four running backs? Going without a fullback, which appears likely, only three tight ends instead of four, and eight offensive linemen instead of nine could make this possible. And given durability questions surrounding both Jones and Thompson, maybe it’s a smart decision.

[Best and worst from 20-13 victory over Buccaneers]

But needs elsewhere on the roster could make carrying four running backs impossible.

Meanwhile, defensive linemen Anthony Lanier, Cullen Jenkins, Matt Ioannidis, Corey Crawford and Jerrell Powe all did their best to help their causes.

Lanier stood out the most, as he has in each of the past three weeks. The undrafted rookie out of Alabama A&M has great length, quality strength, and a good first step, which enables him to beat offensive linemen off the ball. Jenkins, a 13-year veteran who just joined the team on Monday, appears to have something to offer, as he shed blockers to get to ball-carriers, and got into the backfield with a couple spin moves. He also had a sack.

Powe, who missed most of the preseason recovering from a heart procedure he underwent in training camp, and Crawford look like they belong in the NFL, and each made a few contributions. But they are far from locks for roster spots. Ioannidis, a fifth-round draft pick, looks like he could benefit from a year on the practice squad.

[Cousins arranges tribute to team official Kelly]

Outside linebackers Lynden Trail, Houston Bates and Mike Wakefield all have something to offer. Each aimed for the final spot behind Ryan Kerrigan, Preston Smith and Trent Murphy.

The argument could be made that Trail and Bates boast more promise than Murphy. Coaches briefly converted Murphy to defensive line, only to move him back because the team needed outside linebacker depth after Junior Galette’s season-ending injury.

Trail helped himself not only with defensive play, but with contributions on special teams, where despite his size (6 feet 7, 270 pounds) he is consistently among the first players downfield on the punt coverage unit. But he remains raw, and officials could lean toward “redshirting” him with a year on the practice squad. Bates is a tad undersize (generously listed at 6-3, 252), but he could help on special teams, so he carries value.

Meanwhile, inside linebackers Terence Garvin and Carlos Fields both seem like capable backups/special teams aces. But with Will Compton, Mason Foster, Su’a Cravens and Martrell Spaight locked in for roster spots, the Redskins can’t keep both.

And second-year safety Deshazor Everett — who converted from cornerback this offseason — is another question mark. Everett finds himself behind starters DeAngelo Hall and David Bruton Jr. and backups Will Blackmon and Duke Ihenacho.

Everett played well in coverage, breaking up passes (setting up Ihenacho for an interception on one play), and is also among the young potential special teams aces.

Everett’s play both Wednesday and earlier in camp — and his special teams contributions last season — could force decision-makers to go with five safeties. But can they afford to keep him because of needs elsewhere?

These are good problems to have.