The Red Sox have a fine team that should contend for a title but I question whether a club that has received a combined negative 1.0 fWAR from three positions (C,2B,3B) is the deepest in recent history.
https://www.fangraphs.com/leaders.aspx?pos=c&stats=bat&lg=all&qual=0&type=8&season=2018&month=0&season1=2018&ind=0&team=3,ts&rost=0&age=0&filter=&players=0
https://www.fangraphs.com/leaders.aspx?pos=2b&stats=bat&lg=all&qual=0&type=8&season=2018&month=0&season1=2018&ind=0&team=3,ts&rost=0&age=0&filter=&players=0
https://www.fangraphs.com/leaders.aspx?pos=3b&stats=bat&lg=all&qual=0&type=8&season=2018&month=0&season1=2018&ind=0&team=3,ts&rost=0&age=0&filter=&players=0