This is an analysis that is strictly for the BD pace bowling department since both coaches are former fast bowlers. I have eliminated all the other bowlers (Sarkar, et al). In total there were 10 different bowlers used during the period:
1. Rubel Hossain
2. Shafiul Islam
3. Taskin Ahmed
4. Mustafizur Rahman
5. Kamrul Islam Rabbi
6. Subashish Roy
7. Shahadat Hossain
8. Robiul Islam
9. Al-Amin Hossain
10. Mohammad Shahid
Heath Streak
Streak's coaching stint went from May 2014 to July 2016. There were 7 pace bowlers who featured in tests. The most successful bowler was Shafiul Islam, who took
7 wickets at an impressive average of 27.00. In terms of average Mustafizur Rahman was the most successful, going at
14.50 for each wicket. The mean average per wicket for a pace bowler in this period was
44.39.
There was also discipline in the area of tight lines and lengths; this is indicated in the average economy rate: 2.84
Courtney Walsh
Walsh took over from August 2016 to present, under current leadership, the number of pace bowlers dropped to 6. Not a significant drop in the grand scheme of things, but there were new bowlers introduced and some from the Streak period being permanently discarded: Shahadat Hossain, Robiul Islam, Al-Amin Hossain, and Mohammad Shahid. With the lack of experience in his armory, even a blind person can predict the demise of the pace bowling department. What followed was a farce. The bowlers were ineffective and toothless.
Let me give the mean average per wicket:
85.09 per wicket. It is almost twice than what was attained in the Streak era. Dismal and unacceptable. If the average per wicket was a disappointment, then there's more disappointment.
The average economy rate is hovering close to 4 runs an over:
3.91. And they picked up a wicket every 127 balls in comparison with Streak's troupe (94 balls). That's over 21 overs for fast bowlers to get a wicket; almost Rubel-esque. Hard to buy a wicket with those stats. The most successful bowler in this period is Mustafizur Rahman:
22 wickets at 34.59 .
There were 3 bowlers that were coached by both Streak and Walsh: Rubel, Shafiul, and Mustafizur
So many calls to sack Walsh, and yet here were are...Walsh still there and the same cast of characters featuring in the show. BD needs a new bowling coach ASAP.
************
************
Stats were obtained from Cricinfo and Howstat