3. José Arnaiz
Unlike the players mentioned before, Arnaiz has not spent years of his childhood in La Masia and hasn't gone a long way to the B team. He joined Blaugrana from Valladollid in 2017, when he was already 22.
Jose can play as a right wing forward and a striker.
Having spent only one season in Barca B, Jose is already one of the most promising players in Segunda Division. He had his debut with Valverde's team in October and set an outstanding record in Copa del Rey: 4 matches, 3 shots and 3 goals. Plus one game in La Liga, but not very decisive performance there.
In the second tier of Spanish football league system, Arnaiz played 21 games, scored six and assisted four times. Everything was going well, but... Okay, not very difficult to guess. Muscle injury. Just like Oriol Busquets, he is absent since February and will be back next season. If he regains his form, he will have the chance to enjoy much more minutes with the first team than he used to do a few months ago.
Here is the video about his stats and career highlights.