49ers face tactical test against Seahawks coach Mike Macdonald
The San Francisco 49ers face the Seattle Seahawks this Sunday in a critical Week 5 matchup that will decide first place in the NFC West. For coach Kyle Shanahan and quarterback Brock Purdy, the game represents a tactical test against Seahawks coach Mike Macdonald, who has historically stifled the 49ers’ offense.
The Tactical Challenge of the Macdonald Defense
The 49ers enter Seattle carrying the weight of a 41-6 loss in last season’s NFC Divisional Round, a game where the Seahawks’ defense effectively neutralized San Francisco. Kyle Shanahan identified the core of the problem this week, noting that while Macdonald’s defense is aggressive, it remains fundamentally disciplined. [It’s] how sound they are, yet [they’re] still aggressive,
Shanahan said. When they’re aggressive, they’re rarely irresponsible. It’s tough to get big plays on them.
According to Shanahan, the Seahawks rely heavily on a two-high safety shell, which prevents explosive plays over the top. This structure, combined with zone-match coverage, allows defenders to stay tight on routes regardless of whether the coverage is technically man or zone. This approach has proven highly effective at closing windows in the middle of the field—the exact area where Purdy has historically thrived.
Data Trends in the NFC West Rivalry
Analytical data highlights the extent of the struggle. Since the start of the 2025 season, roughly 25% of Purdy’s passing attempts have targeted the area between the numbers from five to 20 yards downfield. However, in his three matchups against a Macdonald-led defense, that target share drops to approximately 12%. Per Pro Football Focus, Purdy’s efficiency in these games has plummeted, averaging 5.8 yards per attempt and -0.88 expected points added per play, compared to his broader averages of 9.7 yards per attempt and 0.45 EPA per play against other opponents.
The 49ers’ offensive success has historically correlated with their ability to stay under center rather than relying on heavy shotgun usage. In their 2024 win against Seattle, the team utilized the shotgun on 74% of snaps, a threshold Shanahan will likely aim to maintain or lower on Sunday. The team’s inability to score a touchdown against Macdonald’s scheme in their final two meetings last season shows why they must find a new rhythm now.
Adjustments in the Trenches
The battle for divisional control will be won in the run game, where both teams have evolved. While the 49ers have incorporated new motions and alignments to keep defenses guessing, Macdonald has countered by increasing his blitz frequency. Pro Football Focus data shows that Seattle’s blitz rate on run snaps has climbed from 13% in 2024 to nearly 30% in 2026. This tactical shift is designed to close the C-gap bubbles that the 49ers previously exploited for 228 rushing yards in their 2024 meeting.
If Shanahan can make these adjustments and Purdy can manage the middle-of-the-field windows, the 49ers stand to gain a multi-game lead in the NFC West. A victory would not only secure a tie-breaker over Seattle and the Rams but also establish San Francisco as the team to beat in the conference as the season progresses.
Disclaimer: The insights provided in this article are for informational and entertainment purposes only and do not constitute medical advice or sports betting recommendations.