The Memphis Grizzlies' late-season woes continued on Monday as they fell 117-103 to the Boston Celtics. The 14-point home defeat pushed the sliding Western Conference postseason aspirant closer to the verge of play-in territory.Celtics veteran center Al Horford recorded a season-high 26 points, eight rebounds and six 3-pointers, shooting 50.0%. Meanwhile, his superstar teammate Jayson Tatum added 25 points and 14 rebounds as Boston overcame an 11-point first-half deficit to pull away from Memphis late.While the Celtics extended their Eastern Conference-best winning streak to nine games, the Grizzlies dropped their third straight outing and sixth in seven tries. This includes falling to 0-2 under interim coach Tuomas Iisalo.They came up short against Boston despite three of their players tallying 20-plus points, led by star point guard Ja Morant's game-high-tying 26-point performance.With Memphis' latest letdown, it appears in grave danger of falling into a play-in spot after occupying a top-six seed for most of the season.Memphis Grizzlies Playoff Scenario: Updated standingsDespite enduring a three-game slide, the Grizzlies (44-31) remain fifth in the West with seven outings remaining. They trail the fourth-seeded LA Lakers (45-29), whom they're currently slated to face in the playoffs' first round, by 1.5 games.However, the Lakers are engaged in a Monday night home battle against the second-seeded Houston Rockets (49-26) that will shift their record.Additionally, Memphis trails the third-seeded Denver Nuggets (47-28) by three games, giving it an outside shot at a top-three finish.On the flip side, the team could fall as low as eighth. It leads the sixth-seeded Golden State Warriors (43-31) by just half a game. Similarly, it only holds a one-game advantage over the seventh and eighth-seeded Minnesota Timberwolves (43-32) and LA Clippers (43-32).Memphis Grizzlies Playoff Scenario: Remaining scheduleWhile every remaining contest is critical to Memphis' playoff hopes, it won't receive much relief from its schedule. The squad has the NBA's 14th-toughest remaining strength of schedule, with an average opponent winning percentage of .505.Four of the Grizzlies' last seven outings are against winning teams. This includes clashes against Golden State (43-31), the Detroit Pistons (42-33), Minnesota (43-32) and Denver (47-28).Memphis wraps up its three-game homestand on Tuesday against the Warriors in another matchup with considerable seeding implications. It will look to avoid going 0-3 at FedExForum and secure Iisalo his first coaching victory.Also Read: Ja Morant gets honest on recent battle with injuries - "For me, it be tough"