How to loop an object inside an object

I am currently trying to extract the names, age and nation of each player inside the object. I used object keys and it was able to get the position name.

Note: This is vanilla Javascript

const arsenal = {
    name: "Arsenal",
    city: "London",
    startingLineup: {
        gk: { name: "Aaron Ramsdale", age: 24, country: "England" },
        lb: { name: "Oleksandr Zinchenko", age: 26, country: "Ukraine" },
        rb: { name: "Ben White", age: 25, country: "England" },
        lcb: { name: "Gabriel Magalhaes", age: 25, country: "Brazil" },
        rcb: { name: "William Saliba", age: 22, country: "France" },
        cdm: { name: "Thomas Partey", age: 29, country: "Ghana" },
        cm: { name: "Granit Xhaka", age: 30, country: "Switzerland" },
        cam: { name: "Martin Odegaard", age: 23, country: "Norway" },
        lw: { name: "Gabriel Martinelli", age: 21, country: "Brazil" },
        rw: { name: "Bukayo Saka", age: 21, country: "England" },
        st: { name: "Gabriel Jesus", age: 26, country: "Brazil" },
    },
};

Object.keys(arsenal.startingLineup).forEach((pos) => {
    const name = arsenal.startingLineup[pos.name];
    console.log(pos, name);
});

But when I try to get the other information it comes out as undefined. How can I get the rest of the player info?

gk undefined
lb undefined
rb undefined
lcb undefined
rcb undefined
cdm undefined
cm undefined
cam undefined
lw undefined
rw undefined
st undefined