model

(2..7).each do |num|
      define_method("whip_#{num}") do
        if ((self.age + num) < 30)
          (eval("self.whip_#{num-1}") * 0.95)
        else
          (eval("self.whip_#{num-1}") * 1.05)
        end
      end
end

show.html.erb

<% (1..7).each do |bagel| %>
  <p>
		<b>Age: <%= @pitcher.age + (bagel - 1) %></b>
  	<b>Whip <%= bagel %>:</b>
  	<%= eval("@pitcher.whip_#{bagel}").round(2) %>
	</p>
<% end %>