West Ham have wrapped up their summer business by bringing in Athletic Club left-back Adama Boiro on a season-long loan with an option to buy, with the club confirming the move as the transfer window shut. It's the final piece of a defensive rebuild that also saw Morato arrive on loan from Nottingham Forest earlier on transfer deadline day. This gives Nuno Espírito Santo fresh options at both centre-back and left-back heading into what will be a grueling season.
Boiro's arrival capped a chaotic final day of chasing left-back options. West Ham had been tracking Roma's Anass Salah-Eddine, but the Italian club's preference to explore other routes pushed the Hammers toward alternatives, and Boiro quickly emerged as the priority target once his availability became clear. With El Hadji Malick Diouf's £40 million move to Brentford leaving a genuine hole in the squad, and Kyle Walker-Peters and Ollie Scarles the only recognized options on the left, getting a body in before the deadline was essential. West Ham reportedly saw off interest from Portugal's Casa Pia and Spain's Sabadell to get it done.
Boiro is a 24-year-old Senegalese-born full-back who came through the Osasuna academy before Athletic Club. That itself tells you something about his background: to be eligible for Athletic at all, he has deep roots in the Basque football pipeline, and he's spent the past two seasons holding down a rotation role in a genuinely tough, physical La Liga defense. Across 45 appearances for Athletic, he's mostly served as competition and cover rather than a guaranteed starter, making just 14 league appearances last season under previous manager Ernesto Valverde. However, the squad-player status at a club playing continental football is still meaningful experience for a 24-year-old, particularly against elite opposition in a league built around possession and technical quality.
ℹ️ Cesión de Adama Boiro al @WestHam
— Athletic Club (@AthleticClub) September 1, 2026
El lateral sale al club londinense con opción de compra y el @athleticclub ingresa un fijo por la operación.
🔗 https://t.co/DOuIiz0Mkb
🍀 Zorte on, Adama!#AthleticClub 🦁 pic.twitter.com/LaoIXte3Y6
Physically, at 6ft, he offers genuine athletic presence down the flank, and by most accounts his best attribute is his delivery. He can be considered a real crossing threat who likes to get forward and support the attack rather than sit purely as a defensive fullback. Sound familiar? That's exactly the profile West Ham lost when Diouf departed, and it fits the more expansive, front-footed style Nuno has been trying to build into this side. His time in Spain should also mean he's comfortable receiving the ball under pressure and playing out from the back, which matters for a Nuno side that likes to build patiently through midfield rather than go long.
Boiro comes in to provide competition. Scarles has been West Ham's most consistent option at left-back so far this season, but he hasn't done enough to be considered undroppable, and reports around the move to Boiro have been fairly blunt about what it could mean for the young academy graduate. A loan of this length, with an option to buy attached, isn't the profile of a squad depth piece; it's the profile of a player Nuno wants to give a real chance to start. Expect a rotation between the two in the short term, with the shirt likely to go to whoever adapts fastest to Championship football and gives Nuno the more reliable end product going forward.
Morato's moment 💌 pic.twitter.com/kdHDHepF7k
— West Ham United (@WestHam) September 1, 2026
Pairing Boiro's arrival with Morato's loan from Forest gives West Ham two fresh defensive options heading into an intense schedule. Addressing both centre-back depth and left-back vacancy in the same 24-hour window was necessary. Neither is a marquee, headline name, but both fit the profile West Ham have been targeting all summer: experienced enough to contribute immediately, affordable given the club's financial constraints, and structured as loans with buy options that limit risk while leaving the door open if either makes a genuine impact. It's a pragmatic way to end a pragmatic window, and now the job shifts from recruitment to integration, with both new arrivals needing to get up to speed quickly if they're going to shape West Ham's promotion push.
